Crochet sea animals blanket pattern (C2C) – free ocean-themed design

Want a bright, playful blanket that’s perfect for ocean lovers? This crochet sea animals blanket pattern is made using the corner-to-corner (C2C) method and features six fun ocean animal panels (squares) that are sewn together into one cozy blanket. This ocean-themed C2C blanket makes a cute baby shower gift and is perfect for beachy or under-the-sea nurseries.

You can follow the included graphs or the written color-change instructions for each panel. The finished blanket measures about 45” x 67” (114 x 170 cm) and uses the same materials and layout as my other animal blankets, making it easy to mix and match panels.

This is an advanced beginner crochet pattern. The stitches are simple, but you’ll want to be comfortable with C2C crochet and changing colors as you go.

What is corner-to-corner crochet (C2C)?

Corner-to-corner crochet (also called C2C) is a technique where you crochet diagonally instead of in rows. The project is built using small blocks made of chains and double crochet stitches, starting in one corner and growing row by row until you reach the widest point, then decreasing to finish the opposite corner.

C2C is especially popular for crochet blankets because it works up quickly and makes color changes easy—perfect for fun designs like this sea animals blanket made from individual C2C panels.

Why you’ll love this pattern

• Same size and layout as my other animal C2C blankets. That makes it easy to mix and match panels if you’d like.
• C2C makes color changes simpler and keeps designs clean and graphic
• Six fun ocean animals that kids instantly recognize and love
• Two ways to follow – use the graph or written instructions
• Beginner-friendly stitches – just chains and double crochet stitches
• Great for gifts – perfect for baby showers, birthdays, and ocean-themed nurseries

Mix & match C2C blanket panels

All eight of my C2C blanket patterns are designed using the same panel size and layout, which means the panels can be mixed and matched across collections to create a custom blanket.

Each blanket uses six individual C2C panels arranged in a 2 × 3 layout, and every panel is worked to the same finished size—no resizing or stitch adjustments needed.

Choose panels from one theme or mix designs across sets, then sew them together and add a border to finish your blanket.

Free crochet sea animals blanket pattern details

Ready to start crocheting your sea animals blanket? Below you’ll find everything you need to know before you begin, including the skill level, materials, yarn colors, gauge, finished measurements, and helpful notes to make assembling the blanket easy.

Skill level

Advanced beginner. This crochet sea animals blanket uses the corner-to-corner (C2C) method and includes color changes.

Materials needed

• Crochet hook: G (4.0 mm)
• Yarn: Worsted weight (#4). I used Red Heart Super Saver.
• Yarn needle: Use this to weave in ends.
• Scissors: Use these to cut yarn and fasten off.
• Stitch marker(s): Helpful for holding panels in place while seaming.

Yarn colors (by animal):

• Sea turtle: white, light green, green, yellow, black
• Jellyfish: white, dark pink, pink, purple
• Octopus: white, purple, pink
• Whale: white, blue, black
• Seahorse: white, orange
• Fish: white, mint, green, black

Printable PDF pattern

If you prefer an easy, print-friendly version of this crochet sea animals blanket pattern, a printable PDF is available in my Etsy shop. The PDF includes the full pattern instructions in a clean, ad-free format, making it perfect for printing or saving to your device.

Finished measurements

My crochet baby blanket measures 45 inches by 67 inches (approximately 114 cm by 170 cm).

Gauge

8 C2C blocks (ch 3 + 3 dc) = 4″ (10 cm)

Crochet abbreviations

• dc = double crochet
• sc = single crochet
• hdc = half double crochet
• ch/chs = chain/chains
• st/sts = stitch/stitches
• sl st = slip stitch

Pattern notes

• This blanket is made using the corner-to-corner (C2C) crochet technique.
• You can follow either the graph or the written instructions for color changes.
• Crochet all 6 sea animal panels first, then sew them together to assemble the blanket.
• Each C2C block is made with ch 3 + 3 dc.
• Ch 6 to start a new row, and ch 3 to start each new block.
• Rows worked ↙ are right-side rows. Rows worked ↗ are wrong-side rows.
• This pattern is written in US crochet terms.

New to C2C? Start with my video tutorial

If you’re new to corner-to-corner crochet, I recommend starting with my beginner-friendly C2C video tutorial. It walks you through the basic C2C block, plus increases and decreases, using a small practice panel before jumping into larger projects.

Crochet sea animals C2C baby blanket

Make each of the 6 sea animal panels using the graphs or the written instructions below. Once all the panels are finished, sew them together to assemble the blanket.

Optional border for each panel (before sewing): Ch 1. Work 2 sc in each C2C block space around. In each corner, work (2 sc, ch 2, 2 sc).

1. C2C crochet sea turtle panel

Graph: crochet sea turtle graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 15 (15 blocks)
↗ Row 16: white x 16 (16 blocks)
↙ Row 17: white x 17 (17 blocks)
↗ Row 18: white x 15, light green x 2, white x 1 (18 blocks)
↙ Row 19: white x 2, light green x 2, white x 15 (19 blocks)
↗ Row 20: white x 7, light green x 1, white x 7, light green x 2, white x 3 (20 blocks)
↙ Row 21: white x 3, light green x 3, white x 6, light green x 2, white x 7 (21 blocks)
↗ Row 22: white x 7, light green x 3, white x 5, light green x 3, white x 4 (22 blocks)
↙ Row 23: white x 5, light green x 2, yellow x 2, white x 4, light green x 2, white x 8 (23 blocks)
↗ Row 24: white x 8, light green x 3, white x 2, yellow x 3, green x 3, white x 5 (24 blocks)
↙ Row 25: white x 5, green x 5, yellow x 3, white x 1, light green x 3, white x 8 (25 blocks)
↗ Row 26: white x 8, light green x 4, yellow x 3, green x 6, white x 5 (26 blocks)
↙ Row 27: white x 6, green x 6, yellow x 2, light green x 4, white x 9 (27 blocks)
↗ Row 28: white x 9, light green x 5, yellow x 1, green x 7, white x 6 (28 blocks)
↙ Row 29: white x 6, green x 8, light green x 5, white x 10 (29 blocks)
↗ Row 30: white x 10, light green x 5, green x 8, white x 7 (30 blocks)
↙ Row 31: white x 7, green x 9, light green x 4, white x 11 (31 blocks)
↗ Row 32: white x 12, light green x 3, green x 10, white x 7 (32 blocks)
↙ Row 33: white x 8, green x 10, light green x 2, yellow x 1, white x 12 (33 blocks)
↗ Row 34: white x 12, yellow x 1, light green x 2, green x 11, white x 8 (34 blocks)
↙ Row 35: white x 9, green x 11, light green x 1, yellow x 2, white x 12 (35 blocks)
↗ Row 36: white x 12, yellow x 3, light green x 1, green x 10, white x 10 (36 blocks)
↙ Row 37: white x 10, green x 11, yellow x 3, white x 2, light green x 1, white x 10 (37 blocks)
↗ Row 38: white x 10, light green x 2, white x 1, yellow x 4, green x 10, white x 11 (38 blocks)
↙ Row 39: white x 12, green x 10, yellow x 4, light green x 2, white x 11 (39 blocks)
↗ Row 40: white x 11, light green x 2, yellow x 5, green x 10, white x 12 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 12, green x 10, yellow x 4, light green x 2, white x 11 (39 blocks)
↗ Row 42: white x 10, light green x 2, yellow x 5, green x 9, white x 12 (38 blocks)
↙ Row 43: white x 11, green x 10, yellow x 4, light green x 2, white x 10 (37 blocks)
↗ Row 44: white x 10, light green x 1, yellow x 5, green x 9, white x 11 (36 blocks)
↙ Row 45: white x 11, green x 9, light green x 3, yellow x 1, light green x 1, white x 10 (35 blocks)
↗ Row 46: white x 11, light green x 4, green x 8, white x 11 (34 blocks)
↙ Row 47: white x 11, green x 8, light green x 3, white x 11 (33 blocks)
↗ Row 48: white x 10, light green x 4, green x 7, white x 11 (32 blocks)
↙ Row 49: white x 12, green x 5, light green x 4, white x 10 (31 blocks)
↗ Row 50: white x 9, light green x 6, green x 2, white x 13 (30 blocks)
↙ Row 51: white x 14, light green x 7, white x 8 (29 blocks)
↗ Row 52: white x 7, light green x 8, white x 13 (28 blocks)
↙ Row 53: white x 12, light green x 6, black x 2, light green x 1, white x 6 (27 blocks)
↗ Row 54: white x 5, light green x 1, black x 1, light green x 7, white x 12 (26 blocks)
↙ Row 55: white x 11, light green x 8, black x 1, light green x 1, white x 4 (25 blocks)
↗ Row 56: white x 4, light green x 10, white x 10 (24 blocks)
↙ Row 57: white x 10, light green x 4, white x 1, light green x 5, white x 3 (23 blocks)
↗ Row 58: white x 3, light green x 4, white x 2, light green x 4, white x 9 (22 blocks)
↙ Row 59: white x 9, light green x 3, white x 1, black x 1, white x 1, light green x 4, white x 2 (21 blocks)
↗ Row 60: white x 2, light green x 4, white x 2, light green x 3, white x 9 (20 blocks)
↙ Row 61: white x 8, light green x 4, white x 1, light green x 4, white x 2 (19 blocks)
↗ Row 62: white x 2, light green x 8, white x 8 (18 blocks)
↙ Row 63: white x 8, light green x 7, white x 2 (17 blocks)
↗ Row 64: white x 3, light green x 5, white x 8 (16 blocks)
↙ Row 65: white x 9, light green x 2, white x 4 (15 blocks)
↗ Row 66: white x 14 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

2. C2C crochet jellyfish panel

Graph: crochet jellyfish graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 15 (15 blocks)
↗ Row 16: white x 16 (16 blocks)
↙ Row 17: white x 12, dark pink x 1, white x 4 (17 blocks)
↗ Row 18: white x 5, dark pink x 1, white x 12 (18 blocks)
↙ Row 19: white x 11, dark pink x 2, white x 2, dark pink x 1, white x 3 (19 blocks)
↗ Row 20: white x 4, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 11 (20 blocks)
↙ Row 21: white x 11, dark pink x 1, pink x 1, white x 2, dark pink x 1, white x 5 (21 blocks)
↗ Row 22: white x 2, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 11 (22 blocks)
↙ Row 23: white x 11, pink x 2, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, white x 3 (23 blocks)
↗ Row 24: white x 4, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, dark pink x 1, pink x 1, white x 11 (24 blocks)
↙ Row 25: white x 11, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 4 (25 blocks)
↗ Row 26: white x 5, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 11 (26 blocks)
↙ Row 27: white x 11, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 6 (27 blocks)
↗ Row 28: white x 4, dark pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 11 (28 blocks)
↙ Row 29: white x 11, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, dark pink x 1, white x 5 (29 blocks)
↗ Row 30: white x 6, dark pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 2, white x 11 (30 blocks)
↙ Row 31: white x 11, dark pink x 1, pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, white x 3 (31 blocks)
↗ Row 32: white x 4, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, dark pink x 2, white x 2, dark pink x 2, white x 2, pink x 1, dark pink x 1, white x 1, pink x 2, white x 8 (32 blocks)
↙ Row 33: white x 8, pink x 3, dark pink x 1, pink x 1, white x 2, dark pink x 2, white x 2, dark pink x 2, white x 2, dark pink x 1, pink x 1, white x 1, dark pink x 2, white x 5 (33 blocks)
↗ Row 34: white x 6, pink x 1, dark pink x 1, white x 1, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 5, white x 8 (34 blocks)
↙ Row 35: white x 8, pink x 5, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 1, dark pink x 1, pink x 1, white x 7 (35 blocks)
↗ Row 36: white x 8, pink x 1, dark pink x 1, white x 1, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 1, pink x 6, white x 8 (36 blocks)
↙ Row 37: white x 8, pink x 7, dark pink x 1, pink x 1, white x 2, dark pink x 1, pink x 1, white x 2, pink x 1, dark pink x 1, white x 1, pink x 2, white x 9 (37 blocks)
↗ Row 38: white x 10, dark pink x 1, pink x 1, white x 1, dark pink x 1, pink x 1, white x 2, pink x 1, dark pink x 1, white x 2, pink x 9, white x 8 (38 blocks)
↙ Row 39: white x 9, pink x 8, white x 2, dark pink x 1, pink x 1, white x 2, pink x 1, dark pink x 1, white x 1, pink x 1, dark pink x 1, white x 11 (39 blocks)
↗ Row 40: white x 12, dark pink x 1, pink x 1, white x 1, dark pink x 1, pink x 1, white x 2, pink x 1, dark pink x 1, white x 1, pink x 9, white x 9 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 8, pink x 4, white x 1, pink x 5, dark pink x 1, pink x 1, white x 2, dark pink x 2, white x 1, pink x 1, dark pink x 1, white x 12 (39 blocks)
↗ Row 42: white x 12, dark pink x 1, pink x 1, white x 1, dark pink x 2, white x 2, pink x 6, white x 2, pink x 3, white x 8 (38 blocks)
↙ Row 43: white x 7, pink x 3, white x 1, black x 1, white x 1, pink x 1, black x 2, pink x 2, white x 2, dark pink x 1, pink x 1, white x 1, pink x 1, dark pink x 1, white x 12 (37 blocks)
↗ Row 44: white x 12, dark pink x 1, white x 2, pink x 1, dark pink x 1, white x 1, pink x 2, black x 1, pink x 3, white x 1, black x 1, white x 1, pink x 2, white x 7 (36 blocks)
↙ Row 45: white x 6, pink x 3, white x 2, pink x 4, black x 1, pink x 2, dark pink x 1, pink x 1, white x 2, dark pink x 1, white x 12 (35 blocks)
↗ Row 46: white x 11, pink x 1, dark pink x 1, white x 2, pink x 3, black x 1, pink x 5, white x 1, pink x 3, white x 6 (34 blocks)
↙ Row 47: white x 5, pink x 13, white x 2, dark pink x 1, pink x 1, white x 11 (33 blocks)
↗ Row 48: white x 11, pink x 1, dark pink x 1, white x 1, pink x 3, black x 1, pink x 9, white x 5 (32 blocks)
↙ Row 49: white x 4, pink x 14, dark pink x 1, pink x 1, white x 11 (31 blocks)
↗ Row 50: white x 11, pink x 15, white x 4 (30 blocks)
↙ Row 51: white x 4, pink x 14, white x 11 (29 blocks)
↗ Row 52: white x 10, pink x 5, white x 1, pink x 9, white x 3 (28 blocks)
↙ Row 53: white x 3, pink x 8, white x 2, pink x 5, white x 9 (27 blocks)
↗ Row 54: white x 9, pink x 4, white x 1, black x 1, white x 1, pink x 7, white x 3 (26 blocks)
↙ Row 55: white x 2, pink x 7, white x 1, black x 1, white x 1, pink x 5, white x 8 (25 blocks)
↗ Row 56: white x 8, pink x 5, white x 2, pink x 7, white x 2 (24 blocks)
↙ Row 57: white x 2, pink x 7, white x 1, pink x 5, white x 8 (23 blocks)
↗ Row 58: white x 8, pink x 12, white x 2 (22 blocks)
↙ Row 59: white x 2, pink x 11, white x 8 (21 blocks)
↗ Row 60: white x 8, pink x 10, white x 2 (20 blocks)
↙ Row 61: white x 3, pink x 8, white x 8 (19 blocks)
↗ Row 62: white x 9, pink x 5, white x 4 (18 blocks)
↙ Row 63: white x 17 (17 blocks)
↗ Row 64: white x 16 (16 blocks)
↙ Row 65: white x 15 (15 blocks)
↗ Row 66: white x 14 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

3. C2C crochet octopus panel

Graph: crochet octopus graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 7, purple x 1, white x 4 (12 blocks)
↙ Row 13: white x 4, purple x 3, white x 6 (13 blocks)
↗ Row 14: white x 6, purple x 4, white x 4 (14 blocks)
↙ Row 15: white x 4, purple x 5, white x 6 (15 blocks)
↗ Row 16: white x 7, purple x 2, white x 1, purple x 2, white x 4 (16 blocks)
↙ Row 17: white x 4, purple x 2, white x 2, purple x 2, white x 7 (17 blocks)
↗ Row 18: white x 2, purple x 3, white x 3, purple x 1, white x 2, purple x 2, white x 5 (18 blocks)
↙ Row 19: white x 5, purple x 2, white x 2, purple x 1, white x 3, purple x 4, white x 2 (19 blocks)
↗ Row 20: white x 4, purple x 3, white x 5, purple x 2, white x 6 (20 blocks)
↙ Row 21: white x 6, purple x 2, white x 5, purple x 3, white x 5 (21 blocks)
↗ Row 22: white x 6, purple x 3, white x 4, purple x 2, white x 7 (22 blocks)
↙ Row 23: white x 7, purple x 3, white x 4, purple x 2, white x 7 (23 blocks)
↗ Row 24: white x 7, purple x 3, white x 3, purple x 3, white x 8 (24 blocks)
↙ Row 25: white x 5, purple x 3, white x 1, purple x 3, white x 2, purple x 3, white x 8 (25 blocks)
↗ Row 26: white x 2, purple x 1, white x 5, purple x 3, white x 2, purple x 3, white x 1, purple x 4, white x 5 (26 blocks)
↙ Row 27: white x 5, purple x 9, white x 1, purple x 3, white x 6, purple x 1, white x 2 (27 blocks)
↗ Row 28: white x 3, purple x 1, white x 5, purple x 3, white x 2, purple x 9, white x 5 (28 blocks)
↙ Row 29: white x 6, purple x 2, white x 1, purple x 6, white x 1, purple x 3, white x 5, purple x 2, white x 3 (29 blocks)
↗ Row 30: white x 4, purple x 2, white x 4, purple x 3, white x 1, purple x 6, white x 2, purple x 2, white x 6 (30 blocks)
↙ Row 31: white x 7, purple x 2, white x 2, purple x 16, white x 4 (31 blocks)
↗ Row 32: white x 5, purple x 15, white x 3, purple x 1, white x 8 (32 blocks)
↙ Row 33: white x 9, purple x 1, white x 3, purple x 14, white x 6 (33 blocks)
↗ Row 34: white x 7, purple x 14, white x 13 (34 blocks)
↙ Row 35: white x 14, purple x 13, white x 8 (35 blocks)
↗ Row 36: white x 10, purple x 12, white x 14 (36 blocks)
↙ Row 37: white x 14, purple x 9, white x 14 (37 blocks)
↗ Row 38: white x 6, purple x 2, white x 6, purple x 11, white x 13 (38 blocks)
↙ Row 39: white x 12, purple x 13, white x 5, purple x 3, white x 6 (39 blocks)
↗ Row 40: white x 6, purple x 4, white x 3, purple x 16, white x 11 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 10, purple x 17, white x 4, purple x 3, white x 5 (39 blocks)
↗ Row 42: white x 5, purple x 2, white x 4, purple x 18, white x 9 (38 blocks)
↙ Row 43: white x 8, purple x 6, black x 2, purple x 11, white x 3, purple x 3, white x 4 (37 blocks)
↗ Row 44: white x 4, purple x 3, white x 2, purple x 11, black x 1, purple x 8, white x 7 (36 blocks)
↙ Row 45: white x 7, purple x 4, white x 1, purple x 3, black x 1, purple x 15, white x 4 (35 blocks)
↗ Row 46: white x 4, purple x 14, black x 1, purple x 3, white x 2, purple x 4, white x 6 (34 blocks)
↙ Row 47: white x 5, purple x 4, white x 1, black x 1, white x 1, purple x 11, white x 1, purple x 5, white x 4 (33 blocks)
↗ Row 48: white x 4, purple x 4, white x 1, purple x 3, white x 2, purple x 3, black x 1, purple x 3, white x 1, black x 1, white x 1, purple x 3, white x 5 (32 blocks)
↙ Row 49: white x 4, purple x 4, white x 2, purple x 7, white x 3, purple x 3, white x 8 (31 blocks)
↗ Row 50: white x 7, purple x 3, white x 4, purple x 4, white x 1, purple x 2, white x 1, purple x 4, white x 4 (30 blocks)
↙ Row 51: white x 3, purple x 7, white x 2, purple x 4, white x 4, purple x 2, white x 7 (29 blocks)
↗ Row 52: white x 6, purple x 2, white x 5, purple x 3, white x 1, black x 1, white x 1, purple x 6, white x 3 (28 blocks)
↙ Row 53: white x 2, purple x 6, white x 1, black x 1, white x 1, purple x 4, white x 4, purple x 2, white x 6 (27 blocks)
↗ Row 54: white x 5, purple x 2, white x 1, purple x 2, white x 2, purple x 4, white x 2, purple x 6, white x 2 (26 blocks)
↙ Row 55: white x 2, purple x 6, white x 1, purple x 4, white x 3, purple x 4, white x 5 (25 blocks)
↗ Row 56: white x 5, purple x 3, white x 4, purple x 10, white x 2 (24 blocks)
↙ Row 57: white x 1, purple x 10, white x 5, purple x 2, white x 5 (23 blocks)
↗ Row 58: white x 11, purple x 10, white x 1 (22 blocks)
↙ Row 59: white x 1, purple x 9, white x 11 (21 blocks)
↗ Row 60: white x 11, purple x 8, white x 1 (20 blocks)
↙ Row 61: white x 2, purple x 6, white x 11 (19 blocks)
↗ Row 62: white x 12, purple x 4, white x 2 (18 blocks)
↙ Row 63: white x 17 (17 blocks)
↗ Row 64: white x 16 (16 blocks)
↙ Row 65: white x 15 (15 blocks)
↗ Row 66: white x 14 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

4. C2C crochet whale panel

Graph: crochet whale graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 15 (15 blocks)
↗ Row 16: white x 16 (16 blocks)
↙ Row 17: white x 17 (17 blocks)
↗ Row 18: white x 18 (18 blocks)
↙ Row 19: white x 6, mint x 4, white x 9 (19 blocks)
↗ Row 20: white x 8, mint x 7, white x 5 (20 blocks)
↙ Row 21: white x 5, mint x 9, white x 7 (21 blocks)
↗ Row 22: white x 7, mint x 14, white x 1 (22 blocks)
↙ Row 23: white x 1, mint x 16, white x 6 (23 blocks)
↗ Row 24: white x 6, mint x 16, white x 2 (24 blocks)
↙ Row 25: white x 2, mint x 6, white x 2, mint x 9, white x 6 (25 blocks)
↗ Row 26: white x 6, mint x 9, white x 2, mint x 6, white x 3 (26 blocks)
↙ Row 27: white x 3, mint x 6, white x 3, mint x 9, white x 6 (27 blocks)
↗ Row 28: white x 6, mint x 9, white x 3, mint x 3, white x 1, mint x 2, white x 4 (28 blocks)
↙ Row 29: white x 7, mint x 3, white x 3, mint x 10, white x 6 (29 blocks)
↗ Row 30: white x 6, mint x 10, white x 3, mint x 4, white x 7 (30 blocks)
↙ Row 31: white x 8, mint x 3, white x 3, mint x 11, white x 6 (31 blocks)
↗ Row 32: white x 6, mint x 12, white x 2, mint x 4, white x 8 (32 blocks)
↙ Row 33: white x 9, mint x 3, white x 3, mint x 12, white x 6 (33 blocks)
↗ Row 34: white x 6, mint x 13, white x 15 (34 blocks)
↙ Row 35: white x 16, mint x 13, white x 6 (35 blocks)
↗ Row 36: white x 6, mint x 14, white x 16 (36 blocks)
↙ Row 37: white x 16, mint x 15, white x 6 (37 blocks)
↗ Row 38: white x 7, mint x 14, white x 17 (38 blocks)
↙ Row 39: white x 17, mint x 15, white x 7 (39 blocks)
↗ Row 40: white x 7, mint x 16, white x 17 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 17, mint x 11, black x 2, mint x 2, white x 7 (39 blocks)
↗ Row 42: white x 6, mint x 2, black x 1, mint x 13, white x 16 (38 blocks)
↙ Row 43: white x 16, mint x 13, black x 1, mint x 1, white x 6 (37 blocks)
↗ Row 44: white x 5, mint x 1, black x 1, mint x 14, white x 15 (36 blocks)
↙ Row 45: white x 15, mint x 15, white x 5 (35 blocks)
↗ Row 46: white x 4, mint x 16, white x 14 (34 blocks)
↙ Row 47: white x 14, mint x 15, white x 4 (33 blocks)
↗ Row 48: white x 3, mint x 16, white x 13 (32 blocks)
↙ Row 49: white x 13, mint x 10, black x 1, mint x 4, white x 3 (31 blocks)
↗ Row 50: white x 2, mint x 4, black x 2, mint x 9, white x 13 (30 blocks)
↙ Row 51: white x 12, mint x 10, black x 1, mint x 4, white x 2 (29 blocks)
↗ Row 52: white x 2, mint x 14, white x 12 (28 blocks)
↙ Row 53: white x 12, mint x 13, white x 2 (27 blocks)
↗ Row 54: white x 1, mint x 13, white x 12 (26 blocks)
↙ Row 55: white x 12, mint x 12, white x 1 (25 blocks)
↗ Row 56: white x 1, mint x 11, white x 2, blue x 3, white x 7 (24 blocks)
↙ Row 57: white x 6, blue x 4, white x 2, mint x 10, white x 1 (23 blocks)
↗ Row 58: white x 1, mint x 9, white x 3, blue x 3, white x 6 (22 blocks)
↙ Row 59: white x 12, mint x 7, white x 2 (21 blocks)
↗ Row 60: white x 2, mint x 5, white x 3, blue x 1, white x 1, blue x 1, white x 7 (20 blocks)
↙ Row 61: white x 5, blue x 5, white x 9 (19 blocks)
↗ Row 62: white x 9, blue x 1, white x 1, blue x 3, white x 4 (18 blocks)
↙ Row 63: white x 3, blue x 3, white x 1, blue x 2, white x 8 (17 blocks)
↗ Row 64: white x 8, blue x 1, white x 1, blue x 3, white x 3 (16 blocks)
↙ Row 65: white x 2, blue x 3, white x 1, blue x 2, white x 7 (15 blocks)
↗ Row 66: white x 7, blue x 1, white x 2, blue x 2, white x 2 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

5. C2C crochet seahorse panel

Graph: crochet seahorse graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 15 (15 blocks)
↗ Row 16: white x 16 (16 blocks)
↙ Row 17: white x 17 (17 blocks)
↗ Row 18: white x 18 (18 blocks)
↙ Row 19: white x 19 (19 blocks)
↗ Row 20: white x 20 (20 blocks)
↙ Row 21: white x 17, orange x 1, white x 3 (21 blocks)
↗ Row 22: white x 2, orange x 4, white x 16 (22 blocks)
↙ Row 23: white x 16, orange x 5, white x 2 (23 blocks)
↗ Row 24: white x 2, orange x 6, white x 16 (24 blocks)
↙ Row 25: white x 16, orange x 3, white x 2, orange x 2, white x 2 (25 blocks)
↗ Row 26: white x 2, orange x 2, white x 3, orange x 3, white x 16 (26 blocks)
↙ Row 27: white x 16, pink x 1, orange x 2, white x 4, orange x 1, white x 3 (27 blocks)
↗ Row 28: white x 3, orange x 3, white x 2, orange x 3, pink x 1, white x 16 (28 blocks)
↙ Row 29: white x 17, orange x 3, yellow x 1, white x 1, orange x 3, white x 4 (29 blocks)
↗ Row 30: white x 5, orange x 2, white x 1, yellow x 1, orange x 3, pink x 1, white x 17 (30 blocks)
↙ Row 31: white x 17, pink x 1, orange x 3, yellow x 1, white x 9 (31 blocks)
↗ Row 32: white x 9, yellow x 1, orange x 4, white x 18 (32 blocks)
↙ Row 33: white x 18, pink x 1, orange x 3, yellow x 2, white x 9 (33 blocks)
↗ Row 34: white x 10, yellow x 2, orange x 3, pink x 1, white x 18 (34 blocks)
↙ Row 35: white x 18, pink x 1, orange x 3, yellow x 3, white x 10 (35 blocks)
↗ Row 36: white x 11, yellow x 3, orange x 3, pink x 1, white x 18 (36 blocks)
↙ Row 37: white x 17, pink x 2, orange x 4, yellow x 3, white x 11 (37 blocks)
↗ Row 38: white x 12, yellow x 3, orange x 5, pink x 3, white x 1, pink x 1, white x 13 (38 blocks)
↙ Row 39: white x 13, pink x 5, orange x 5, yellow x 4, white x 12 (39 blocks)
↗ Row 40: white x 13, yellow x 4, orange x 7, pink x 5, white x 11 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 11, pink x 2, orange x 9, yellow x 4, white x 13 (39 blocks)
↗ Row 42: white x 13, yellow x 4, orange x 9, pink x 2, white x 10 (38 blocks)
↙ Row 43: white x 10, pink x 1, orange x 9, yellow x 4, white x 13 (37 blocks)
↗ Row 44: white x 13, yellow x 5, orange x 8, pink x 3, white x 7 (36 blocks)
↙ Row 45: white x 7, pink x 2, orange x 8, yellow x 5, white x 13 (35 blocks)
↗ Row 46: white x 18, orange x 8, pink x 2, white x 6 (34 blocks)
↙ Row 47: white x 6, pink x 1, orange x 9, white x 17 (33 blocks)
↗ Row 48: white x 16, orange x 10, pink x 1, white x 5 (32 blocks)
↙ Row 49: white x 4, pink x 2, orange x 10, white x 15 (31 blocks)
↗ Row 50: white x 15, orange x 10, pink x 2, white x 3 (30 blocks)
↙ Row 51: white x 3, pink x 2, orange x 10, white x 14 (29 blocks)
↗ Row 52: white x 14, orange x 3, white x 1, orange x 5, pink x 2, white x 3 (28 blocks)
↙ Row 53: white x 3, pink x 1, orange x 5, white x 2, orange x 3, white x 13 (27 blocks)
↗ Row 54: white x 13, orange x 2, white x 1, black x 1, white x 1, orange x 4, pink x 2, white x 2 (26 blocks)
↙ Row 55: white x 2, pink x 2, orange x 4, white x 2, orange x 3, white x 12 (25 blocks)
↗ Row 56: white x 10, orange x 5, white x 1, orange x 4, pink x 3, white x 1 (24 blocks)
↙ Row 57: white x 3, pink x 1, orange x 6, white x 1, orange x 2, white x 10 (23 blocks)
↗ Row 58: white x 10, orange x 1, white x 2, orange x 5, pink x 2, white x 2 (22 blocks)
↙ Row 59: white x 2, pink x 2, orange x 4, white x 2, orange x 1, white x 10 (21 blocks)
↗ Row 60: white x 13, orange x 3, pink x 3, white x 1 (20 blocks)
↙ Row 61: white x 19 (19 blocks)
↗ Row 62: white x 18 (18 blocks)
↙ Row 63: white x 17 (17 blocks)
↗ Row 64: white x 16 (16 blocks)
↙ Row 65: white x 15 (15 blocks)
↗ Row 66: white x 14 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

6. C2C crochet fish panel

Graph: crochet fish graph
Written instructions:
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 13, green x 1, white x 1 (15 blocks)
↗ Row 16: white x 1, green x 1, white x 14 (16 blocks)
↙ Row 17: white x 6, blue x 1, white x 7, green x 2, white x 1 (17 blocks)
↗ Row 18: white x 2, green x 1, white x 8, blue x 1, white x 6 (18 blocks)
↙ Row 19: white x 6, blue x 2, white x 7, green x 2, white x 2 (19 blocks)
↗ Row 20: white x 2, green x 3, white x 7, blue x 2, white x 6 (20 blocks)
↙ Row 21: white x 7, blue x 2, white x 7, green x 3, white x 2 (21 blocks)
↗ Row 22: white x 2, green x 4, white x 6, blue x 3, white x 7 (22 blocks)
↙ Row 23: white x 7, blue x 4, white x 4, green x 4, yellow x 2, white x 2 (23 blocks)
↗ Row 24: white x 2, yellow x 3, green x 8, blue x 4, white x 7 (24 blocks)
↙ Row 25: white x 6, blue x 4, green x 9, yellow x 4, white x 2 (25 blocks)
↗ Row 26: white x 3, yellow x 4, green x 9, blue x 4, white x 6 (26 blocks)
↙ Row 27: white x 6, blue x 4, green x 9, yellow x 4, green x 1, white x 3 (27 blocks)
↗ Row 28: white x 3, green x 3, yellow x 3, green x 8, blue x 5, white x 6 (28 blocks)
↙ Row 29: white x 8, blue x 2, white x 1, green x 7, yellow x 4, green x 4, white x 3 (29 blocks)
↗ Row 30: white x 4, green x 4, yellow x 4, green x 7, white x 11 (30 blocks)
↙ Row 31: white x 12, green x 6, yellow x 2, blue x 1, yellow x 1, green x 5, white x 4 (31 blocks)
↗ Row 32: white x 4, green x 6, blue x 2, yellow x 2, green x 6, white x 12 (32 blocks)
↙ Row 33: white x 13, green x 5, yellow x 2, blue x 3, green x 5, white x 5 (33 blocks)
↗ Row 34: white x 5, green x 6, blue x 3, yellow x 2, green x 5, white x 13 (34 blocks)
↙ Row 35: white x 13, green x 5, yellow x 2, blue x 4, green x 6, white x 5 (35 blocks)
↗ Row 36: white x 6, green x 5, blue x 5, yellow x 2, green x 4, white x 14 (36 blocks)
↙ Row 37: white x 14, green x 3, yellow x 3, blue x 5, green x 6, white x 6 (37 blocks)
↗ Row 38: white x 7, green x 5, blue x 6, yellow x 3, green x 3, white x 14 (38 blocks)
↙ Row 39: white x 14, green x 2, yellow x 5, blue x 5, green x 6, white x 7 (39 blocks)
↗ Row 40: white x 8, green x 6, blue x 3, green x 1, yellow x 9, white x 13 (40 blocks)
Corner: Start decreasing on both ends
↙ Row 41: white x 6, yellow x 2, white x 4, yellow x 9, green x 3, blue x 1, green x 7, white x 7 (39 blocks)
↗ Row 42: white x 7, yellow x 3, green x 8, yellow x 17, white x 3 (38 blocks)
↙ Row 43: white x 2, yellow x 16, green x 8, yellow x 5, white x 6 (37 blocks)
↗ Row 44: white x 6, yellow x 5, green x 8, yellow x 12, white x 5 (36 blocks)
↙ Row 45: white x 6, yellow x 10, green x 8, yellow x 5, white x 6 (35 blocks)
↗ Row 46: white x 5, yellow x 6, green x 9, yellow x 8, white x 6 (34 blocks)
↙ Row 47: white x 7, yellow x 4, green x 11, white x 1, yellow x 5, white x 5 (33 blocks)
↗ Row 48: white x 4, yellow x 5, white x 2, green x 14, white x 7 (32 blocks)
↙ Row 49: white x 8, green x 12, white x 1, black x 1, white x 1, yellow x 4, white x 4 (31 blocks)
↗ Row 50: white x 4, yellow x 4, white x 1, black x 1, white x 1, green x 10, white x 9 (30 blocks)
↙ Row 51: white x 10, green x 9, white x 2, yellow x 4, white x 4 (29 blocks)
↗ Row 52: white x 4, yellow x 4, white x 1, green x 8, white x 11 (28 blocks)
↙ Row 53: white x 12, green x 7, yellow x 2, white x 6 (27 blocks)
↗ Row 54: white x 7, green x 6, white x 13 (26 blocks)
↙ Row 55: white x 25 (25 blocks)
↗ Row 56: white x 24 (24 blocks)
↙ Row 57: white x 23 (23 blocks)
↗ Row 58: white x 22 (22 blocks)
↙ Row 59: white x 21 (21 blocks)
↗ Row 60: white x 20 (20 blocks)
↙ Row 61: white x 19 (19 blocks)
↗ Row 62: white x 18 (18 blocks)
↙ Row 63: white x 17 (17 blocks)
↗ Row 64: white x 16 (16 blocks)
↙ Row 65: white x 15 (15 blocks)
↗ Row 66: white x 14 (14 blocks)
↙ Row 67: white x 13 (13 blocks)
↗ Row 68: white x 12 (12 blocks)
↙ Row 69: white x 11 (11 blocks)
↗ Row 70: white x 10 (10 blocks)
↙ Row 71: white x 9 (9 blocks)
↗ Row 72: white x 8 (8 blocks)
↙ Row 73: white x 7 (7 blocks)
↗ Row 74: white x 6 (6 blocks)
↙ Row 75: white x 5 (5 blocks)
↗ Row 76: white x 4 (4 blocks)
↙ Row 77: white x 3 (3 blocks)
↗ Row 78: white x 2 (2 blocks)
↙ Row 79: white x 1 (1 block)

Assembling the blanket

Sew your crochet sea animals panels together. Make sure they are facing the correct way. You can use locking stitch markers to hold the panels together.

Adding a border (scalloped edge)

Start with blue yarn for Round 1. Switch to mint yarn for Round 2.

Round 1: Ch 2. Work 1 hdc in each stitch around the blanket. In each corner, work (hdc, ch 2, hdc). Join.

Round 2: Ch 2. *Skip 1 stitch, work 4 dc in the next stitch, skip 1 stitch, slip stitch in the next stitch.* Repeat from * to * around the blanket. Join, fasten off, and weave in ends.

Finishing

Weave in your ends. Block if desired.

Frequently asked questions

Is this crochet sea animals blanket pattern beginner-friendly?
This pattern is best for advanced beginners. The stitches are simple, but you’ll need to be comfortable with the corner-to-corner (C2C) method and changing colors.

Do I have to use the graph, or can I follow written instructions?
You can use either one. The pattern includes graphs and written row-by-row color instructions for each panel.

What yarn works best for this C2C crochet blanket?
Worsted weight (#4) yarn works best. I used acrylic yarn, but any worsted weight yarn with good stitch definition will work.

Can I make the blanket bigger or smaller?
Yes. Changing your yarn weight or hook size will change the finished size of the blanket. Just note that this will also affect the size of each sea animal panel.

Can I mix and match the sea animal panels with your other C2C animal blanket patterns?
Yes. All of my C2C animal blanket patterns use the same panel size and layout. Each blanket is made from six individual C2C panels arranged in a 2 × 3 layout, and every panel is worked to the same finished size. This makes it easy to mix and match panels from different collections—no resizing or stitch adjustments needed.

When should I add the border?
Add the main blanket border after all the panels are sewn together. Optional borders around individual panels should be added before assembly.

More free baby blanket patterns

If you loved making this ocean themed baby blanket pattern, you’ll also enjoy these other cozy and beginner-friendly crochet baby blanket patterns.

Let’s connect!

I’d love to see what you’re making! Share your finished project and follow along for more free crochet patterns and tutorials.

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📌 Don’t forget to pin this pattern for later!
Happy crocheting! 🧶
— Melissa