5 Free Sea Creature Amigurumi Patterns (Linked to Each Designer)

Each of these free sea creature amigurumi patterns is a real published pattern with written round-by-round instructions, linked to the designer who wrote it. Three avoid sewing entirely, which matters more here than elsewhere — an octopus has eight tentacles to attach.

Tentacles are the whole problem with sea creatures, and the patterns below solve it in different ways. Pick by how much assembly you are willing to do.

What you will need

A hook smaller than the yarn label suggests, polyester stuffing, a stitch marker, and safety eyes or black yarn. Chunky yarn gives the fastest finish; fine cotton on a 2 to 2.75 mm hook gives the detail.

1. Jelly Bean Octopus

Eight tentacles made in a single round through the front loops only — no sewing at all, which on an octopus is the difference between an evening’s work and an evening plus two hours of attaching legs. Sara works it in light super bulky on a 5 mm hook. Rated beginner, and the best possible first sea creature. Free pattern: Jelly Bean Octopus.

2. Jelly Bean Seahorse

Same no-sew approach from the same designer: the snout is crocheted separately then worked straight into the head rather than stitched on, so the join disappears. Light super bulky on a 5 mm hook, sized for a keychain or a desk plushie. Rated beginner. Making this and the octopus together teaches the whole no-sew method. Free pattern: Jelly Bean Seahorse.

3. No-Sew Jellyfish

Three different kinds of tentacle — single crochet, slip stitch, and a mixed version — attached to a base piece, then joined to an increasing sphere head finished with a shell edging. Ana works it in 3-ply cotton on a 2 mm hook to about 15 cm, so this is fine-gauge work despite being rated beginner-friendly. The varied tentacles are what make it read as a jellyfish rather than a mushroom. Free pattern: No-sew Jellyfish Amigurumi.

4. Mini Sea Turtle

The shell is an African flower hexagon with colour changes, backed by two stuffed inner shell pieces joined before assembly — a much better shell than the usual flat circle, and a good introduction to the African flower motif if you have not made one. Amanda uses worsted on a 3.5 mm hook, about 60 yards, 4.5 inches head to tail. Free pattern: Mini Sea Turtle Amigurumi.

5. Ingrid the Octopus

Eighteen inches from head to tentacle tip — a proper toy rather than a trinket. Lindsey Roe adds bobble stitch suction cups along the lower tentacles and an internal beak that feeds through the body. Organic cotton DK on a 2.75 mm hook, which is a very tight gauge and why it holds its shape at that size. The most ambitious pattern here. Free pattern: Ingrid the Octopus.

The 5 patterns compared

Frequently Asked Questions

Which sea creature is easiest to start with?

The Jelly Bean Octopus. Eight tentacles is normally the most off-putting assembly job in amigurumi, and this pattern makes all eight in one round through the front loops so nothing is sewn on. Chunky yarn on a 5 mm hook finishes it in an evening.

How do I make tentacles that do not look like sausages?

Vary them. The jellyfish here uses three different tentacle constructions — single crochet, slip stitch and a mix — which is what gives movement. Adding bobble suction cups, as Ingrid does, has the same effect on an octopus. Identical tentacles always look stiff.

Why do some patterns use a 2 mm hook?

Fine gauge holds detail and keeps stuffing hidden at small sizes. A 15 cm jellyfish in 3-ply cotton on a 2 mm hook has crisp, even stitches; the same shape in chunky yarn would lose all definition. It is slower, and that is the trade.

Are these safe for small children?

With embroidered eyes rather than safety eyes, yes. The long tentacles on the jellyfish and octopus should also be stitched down firmly at the join. Everything else — cotton or acrylic yarn, polyester stuffing — is machine washable and fine.

Start with one of the no-sew Jelly Bean patterns — they teach the shaping without the assembly. Ingrid is the one to come back to when an 18-inch octopus sounds like a good idea. Each link goes to the designer’s own page.