How to Crochet a Jellyfish: A Step-by-Step Guide to the Most Magical Amigurumi You’ll Ever Make

There is something undeniably enchanting about jellyfish. They drift through the ocean with an effortless, otherworldly grace that has captivated humans for centuries. Now, thanks to the art of crochet, you can bring that magic right into your home — or gift it to someone who deserves a little piece of the sea. Crocheted jellyfish have become one of the most beloved amigurumi projects in the crafting community, and for good reason. They are surprisingly approachable for beginners, endlessly customizable, and the finished result is so charming that people almost always want to make more than one.

Whether you are picking up a crochet hook for the first time or you have been crocheting for years and want a satisfying weekend project, this guide will walk you through everything you need to know. From choosing the right yarn and tools to understanding the basic stitches, assembling your jellyfish, and adding those signature flowing tentacles, you will have all the information you need to create something truly beautiful.

Why Crochet Jellyfish Are So Popular Right Now

The amigurumi trend — the Japanese art of crocheting or knitting small stuffed animals and creatures — has been growing steadily for the past decade, but crocheted jellyfish have claimed a very special place in that world. Part of their appeal is purely visual. The dome-shaped body, the cascading tentacles, and the soft, round eyes combine to create something that looks like it belongs in a fantasy aquarium. They photograph exceptionally well, which has made them wildly popular on platforms like Instagram and Pinterest, where crafters share their finished projects and inspire one another.

Beyond aesthetics, jellyfish are a fantastic project for developing crochet skills. The body is worked in the round, which teaches you one of the most fundamental techniques in amigurumi. The tentacles give you practice with chaining and slip stitching, and if you choose to add embellishments like beads, lace trim, or ribbon, you get to experiment with finishing techniques too. All of this happens within a single project, which means you come away from it a more capable crafter.

They also make extraordinary gifts. A crocheted jellyfish is delightful for children, nursery decorations, desk companions for adults who love the ocean, and even keychains if you make a miniature version. The range of sizes and colors means you can tailor every single one to the person receiving it.

What You Will Need Before You Start

Before diving into the pattern, it is worth spending a moment on materials, because the right choices here will make your experience significantly smoother and your finished jellyfish much more polished.

Yarn is the most important decision. For a classic, soft jellyfish that is safe for children and satisfying to hold, a medium-weight (worsted weight) acrylic yarn works beautifully. It comes in an enormous range of colors, it is affordable, it is easy to wash, and it holds its shape well after stuffing. If you want something with more of a delicate, translucent quality — reminiscent of a real jellyfish — you might experiment with a light fingering-weight yarn or even a shimmery, metallic thread for the tentacles. Many crafters combine a solid yarn for the body with a sparkly or textured yarn for the tentacles, and the effect is absolutely stunning.

Hook size should generally match your yarn. A 4.0 mm or 4.5 mm hook pairs well with worsted weight yarn. If you tend to crochet tightly, go up half a size. If you crochet loosely, go down. The goal is to create a fabric that is tight enough that stuffing will not show through the stitches but not so tight that it is difficult to work with.

Fiberfill stuffing is used to fill the body of the jellyfish and give it that satisfying, rounded dome shape. Polyester fiberfill is the standard choice — it is hypoallergenic, lightweight, and widely available. Do not overstuff, as this can cause the bell to lose its organic, rounded shape and look more like a ball. You want just enough to give it a gentle, full curve.

Safety eyes are the small plastic eyes that click into place and give your jellyfish its personality. Sizes between 9 mm and 12 mm are typical for a standard jellyfish. If you are making the jellyfish for a child under three years old, skip the plastic eyes entirely and embroider the eyes with yarn instead, as safety eyes can present a choking hazard for very young children.

A yarn needle (also called a tapestry needle) is essential for weaving in ends and sewing pieces together if your pattern requires it.

Stitch markers are small, inexpensive tools that save enormous amounts of frustration. When working in continuous rounds — as you will be for the jellyfish body — it is easy to lose track of where one round ends and the next begins. A stitch marker placed at the beginning of each round eliminates that guesswork entirely.

Understanding the Basic Stitches

If you are new to crochet, here is a quick overview of the stitches you will encounter in a jellyfish pattern. If you already know these, feel free to skip ahead.

Magic ring (also called a magic circle): This is how virtually every amigurumi piece begins. It allows you to start crocheting in the round without leaving a visible hole at the center. There are many video tutorials available that demonstrate this technique, and while it can feel awkward at first, most crafters get comfortable with it after a few attempts.

Single crochet (sc): The most fundamental stitch in amigurumi. You insert your hook into a stitch, pull up a loop, then pull through both loops on your hook. Simple, compact, and incredibly useful.

Increase (inc): Two single crochets worked into the same stitch. This makes your piece wider as you go, which is how the dome shape of the jellyfish bell is formed in the early rounds.

Decrease (dec): Two stitches worked together to become one. This is how the dome narrows as you approach the bottom opening of the bell. The invisible decrease technique, where you insert your hook through the front loops only before pulling through, creates a much neater result than the standard decrease.

Slip stitch (sl st): A very flat stitch used to join rounds or create the texture found on some tentacle styles.

Chain (ch): A series of loops linked together, forming the foundation of most tentacle designs.

The Crochet Jellyfish Pattern

The following pattern creates a jellyfish with a body approximately 3 to 4 inches tall (not including tentacles) and 4 inches wide at its widest point, using worsted weight yarn and a 4.0 mm hook.

Abbreviations:
MR = magic ring, sc = single crochet, inc = increase, dec = decrease, sl st = slip stitch, ch = chain, st = stitch, rnd = round

The Bell (Body)

Begin with your main color yarn.

Rnd 1: MR, 6 sc into the ring (6 sts)

Rnd 2: Inc in each st around (12 sts)

Rnd 3: Sc 1, inc repeat around (18 sts)

Rnd 4: Sc 2, inc repeat around (24 sts)

Rnd 5: Sc 3, inc repeat around (30 sts)

Rnd 6: Sc 4, inc repeat around (36 sts)

Rnd 7: Sc 5, inc repeat around (42 sts)

Rnd 8–13: Sc in each st around (42 sts, 6 rounds even)

This is the point where you should insert your safety eyes, placing them between rounds 9 and 10, approximately 6 to 8 stitches apart. If you are embroidering the eyes, you will do so after stuffing and closing.

Rnd 14: Sc 5, dec repeat around (36 sts)

Rnd 15: Sc 4, dec repeat around (30 sts)

Rnd 16: Sc 3, dec repeat around (24 sts)

Now is the time to stuff your bell. Add your fiberfill gradually, shaping as you go. The dome should be gently rounded, not taut.

Rnd 17: Sc 2, dec repeat around (18 sts)

Rnd 18: Sc 1, dec repeat around (12 sts)

Rnd 19: Dec around (6 sts)

Fasten off, leaving a short tail. Use your yarn needle to close the remaining opening by weaving through the front loops of the last 6 stitches and pulling tight.

The Tentacles

This is the most flexible part of the pattern, and the place where you can really let your creativity shine. A classic jellyfish looks wonderful with between 8 and 12 tentacles of varying lengths. Here are two approaches:

Classic chain tentacles: Attach your tentacle yarn to any stitch along the bottom edge of the bell. Chain between 20 and 40 stitches (varying lengths creates a more natural, flowing look), then sl st back along the chain for a slightly ruffled effect. Fasten off and repeat, spacing tentacles evenly around the bottom.

Curly tentacles: Attach yarn to the bottom edge. Chain 20 stitches, then work 2 to 3 sc into each chain stitch as you work back toward the bell. This causes the tentacle to curl naturally. The more stitches you add per chain, the tighter the curl.

For a truly eye-catching jellyfish, consider using two colors of yarn for your tentacles — perhaps a main color that matches the bell and a contrasting shimmer yarn worked alongside it. You can also vary the thickness by holding two strands of yarn together for some tentacles.

Tips for Getting the Best Results

Tension is everything in amigurumi. If your stitches are too loose, the stuffing will poke through and the finished jellyfish will look sloppy. If they are too tight, your hands will tire quickly and the piece will be stiff. Practice swatching before you commit to the full pattern.

Count your stitches at the end of every round. It is tempting to skip this step, but a single missed increase or decrease can throw off your stitch count and cause the bell to lose its symmetry. A few seconds spent counting can save you from frogging (undoing) multiple rounds later.

Block your tentacles if needed. If your tentacles are curling in a direction you do not like or seem stiff, you can gently wet block them — dampen the finished piece with water, shape the tentacles by hand, and allow it to dry flat or hanging.

Weave in ends securely. With all those tentacles, you will have quite a few ends to deal with. Take your time with this step. Weave each end in multiple directions through the surrounding stitches before trimming to ensure nothing unravels with handling.

Experiment with embellishment. Once you have mastered the basic pattern, the possibilities for personalization are endless. Add a ruffled lace trim around the base of the bell. Embroider a tiny smile beneath the eyes. Sew a small bow to the top. Add beads to the ends of the tentacles so they click together gently. Dust the tips of the tentacles with fabric stiffener and curve them into elegant spirals. Every jellyfish can be completely unique.

Color Ideas and Inspiration

One of the most joyful parts of making crocheted jellyfish is choosing colors that feel completely your own. Here are some combinations that crafters return to again and again:

Soft lavender with a silver shimmer thread woven through the tentacles creates a dream-like, bioluminescent quality that looks absolutely magical. Pale pink with white tentacles has a sweet, romantic feel that suits nursery décor perfectly. Deep ocean teal with turquoise tentacles feels bold and vibrant. An ombre yarn that shifts from coral to gold to cream captures the warmth of a sunset sea. Black yarn with glow-in-the-dark thread for the tentacles is dramatic, unexpected, and genuinely delightful when the lights go out.

Do not feel limited to colors found in real jellyfish. Rainbow jellyfish, pastel jellyfish, even holiday-themed jellyfish in red and green or orange and black for Halloween — the freedom of crochet is that color is entirely yours to decide.

Sizing Variations

The pattern above produces a medium-sized jellyfish, but adjusting the size is straightforward. To make a smaller jellyfish — perfect for a keychain or ornament — use fingering-weight yarn with a 2.5 mm hook and stop your increases at round 5 instead of round 7. Your finished bell will be closer to 2 inches wide, and shorter tentacles of 8 to 10 chains will keep it proportional.

For a large, statement jellyfish — the kind that would look spectacular hanging from a ceiling as a mobile or decorating a beach-themed room — use bulky yarn with a 6 mm or 6.5 mm hook and add two or three additional increase rounds after round 7. Tentacles of 60 or more chains will drape beautifully and add to the drama.

Storing and Displaying Your Crochet Jellyfish

Once your jellyfish is complete, consider how you want to display it. Many crafters add a small hanging loop at the top of the bell — simply crochet a short chain, attach both ends to the top of the dome, and you have an instant ornament or hanging decoration. Groups of jellyfish in varying sizes and colors suspended at different heights from a piece of driftwood make a stunning mobile for a child’s room or a coastal-themed living space.

If you are storing finished jellyfish, keep them away from direct sunlight, which can fade yarn colors over time. Store them loosely — not compressed — to help them maintain their rounded shape.

A Final Note Before You Begin

Crochet is, at its heart, a practice in patience and presence. There will be moments — particularly when you are counting stitches for the fifteenth time or untangling a particularly stubborn skein of yarn — when it feels like more effort than it is worth. But then you stuff that little bell, attach the last tentacle, and hold your finished jellyfish in your hands, and the whole experience transforms. You made something from nothing. You made something that brings joy to everyone who sees it.

The ocean is full of wonders, and now, in a very small and wonderful way, so is your home. Happy crocheting.