Crochet Baby Jellyfish Amigurumi Free Pattern with Ruffle Details

There is something undeniably magical about a crocheted jellyfish. Maybe it is the way the tentacles drift downward like the real thing, or maybe it is the round, squishy dome that practically begs to be squeezed. Whatever the reason, jellyfish amigurumi have become one of the most beloved projects in the crochet community, and it is easy to see why. They are approachable for beginners, endlessly customizable, and the finished result is so charming that you will want to make an entire ocean’s worth of them.

This free pattern gives you a baby jellyfish with a sweet, rounded bell, a layered ruffle skirt for extra visual texture, and dangling tentacles that give the finished piece its signature look. Whether you are making this as a nursery decoration, a baby shower gift, a hanging mobile element, or simply a fun weekend project, this pattern has everything you need from start to finish.

Let’s dive in.

Materials You Will Need

Before you pick up your hook, gather everything on this list. Having your supplies ready before you start means you will not lose your momentum mid-project.

Yarn: You will need a small amount of worsted weight yarn in your chosen main color for the bell, a coordinating color for the ruffles, and a third color or the same color as the ruffles for the tentacles. Each jellyfish uses very little yarn, so this is a perfect stash-buster project. Acrylic yarn works beautifully here and is easy to wash, which makes these little creatures ideal gifts for babies and young children.

Hook: A 3.5mm or 4mm crochet hook works well with worsted weight yarn. The tighter your gauge, the less visible the stuffing will be through your stitches, which is what you want in amigurumi.

Stuffing: Polyfill stuffing, sometimes called fiberfill, gives the bell its round, pillowy shape. Do not be shy with the stuffing — a well-stuffed jellyfish holds its dome shape much more convincingly than an understuffed one.

Safety eyes: Two 9mm or 12mm safety eyes add personality to your jellyfish. Black is classic, but you can choose any color you like. If you are making this for a child under three years old, embroider the eyes with yarn instead of using safety eyes, which could be a choking hazard.

Stitch markers: A locking stitch marker helps you keep track of the beginning of each round in amigurumi, where you typically work in continuous rounds.

Scissors and a yarn needle: You will need these for finishing, weaving in ends, and attaching your tentacles.

Optional: A small piece of cardboard or a pencil for wrapping tentacles, if you want a curlier look. More on that later.

Abbreviations and Stitches Used

This pattern uses standard US crochet terminology. Here is a quick reference:

MR — Magic ring (also called magic circle)
ch — Chain
sl st — Slip stitch
sc — Single crochet
inc — Increase (two single crochets in the same stitch)
dec — Invisible decrease (insert hook through the front loops of the next two stitches, yarn over and pull through both loops, yarn over and pull through the two loops on your hook)
BLO — Back loop only
FLO — Front loop only
st(s) — Stitch(es)
rnd — Round

If you are new to amigurumi and have not worked the invisible decrease before, it is worth taking a few minutes to practice it on a swatch. Unlike the standard decrease, the invisible decrease leaves a much neater finish on the outside of your work, which gives amigurumi its characteristic smooth, seamless look.

Understanding the Ruffle Detail

The ruffles are what elevate this jellyfish from a simple dome to something truly special, and they are much easier to make than they look. The technique involves crocheting into the front loops or back loops of specific rounds, which leaves a free row of loops that you then work into later to create a flared, layered ruffle effect.

You will create two ruffles: one around the middle of the bell and one at the base where the tentacles meet the dome. Because you are working into freed loops and increasing as you go, the fabric naturally fans outward into a ruffle shape. The key is not to pull your stitches too tightly — a relaxed tension gives the ruffles their characteristic gentle wave.

The Pattern

Part One: The Bell

Start with your main color yarn.

Rnd 1: Make a magic ring. Work 6 sc into the ring. Pull the ring closed. (6 sts)

Rnd 2: Inc in each stitch 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: *Sc 6, inc* repeat around. (48 sts)

Rnds 9–11: Sc in each stitch around. (48 sts) — These three straight rounds give the bell its slightly cylindrical middle section.

Rnd 12 (Ruffle Prep Round): Working in FLO only, sc in each stitch around. (48 sts) — Do not skip this step. The back loops you leave free here will be used to create the first ruffle.

Rnds 13–15: Sc in each stitch around through both loops as usual. (48 sts)

Rnd 16 (Ruffle Prep Round): Working in FLO only, sc in each stitch around. (48 sts) — Again, these freed back loops will become your second ruffle at the base.

Rnd 17: *Sc 6, dec* repeat around. (42 sts)

Rnd 18: *Sc 5, dec* repeat around. (36 sts)

At this point, insert your safety eyes between rounds 7 and 8, approximately 8 to 10 stitches apart from each other. Take your time with eye placement — it makes a huge difference in the expression of your finished jellyfish. Once you are happy with their position, press the washers firmly onto the backs of the posts.

Rnd 19: *Sc 4, dec* repeat around. (30 sts)

Rnd 20: *Sc 3, dec* repeat around. (24 sts)

Begin stuffing the bell now. Add stuffing gradually as you continue decreasing, making sure to pack it firmly enough to hold the dome shape without distorting the stitches.

Rnd 21: *Sc 2, dec* repeat around. (18 sts)

Rnd 22: *Sc 1, dec* repeat around. (12 sts)

Rnd 23: Dec around. (6 sts)

Fasten off, leaving a short tail. Use your yarn needle to close the remaining 6 stitches by weaving the tail through the front loop of each stitch and pulling gently to close. Weave in the end securely.

Part Two: The Ruffles

Now it is time to work into those freed loops from rounds 12 and 16.

First Ruffle (from Rnd 12 back loops):

Attach your ruffle color yarn to any freed back loop from round 12.

Ruffle Rnd 1: *(sc, ch 3, sc) in the same stitch, sc in next stitch* repeat around all 48 freed loops. Slip stitch to join.

If you want a fuller, more dramatic ruffle, you can work two or even three single crochets in each stitch instead, adjusting as your tension and aesthetic preference dictate. The beauty of this pattern is how easily you can customize the look of the ruffles without changing the structure of the bell itself.

Fasten off and weave in your ends.

Second Ruffle (from Rnd 16 back loops):

Attach your ruffle color yarn to any freed back loop from round 16.

Work the same ruffle pattern as above into all 48 freed loops.

Fasten off and weave in your ends.

The two ruffles will fan outward from the bell at slightly different angles, which creates that layered, dimensional look you see on ruffle jellyfish. If your ruffles feel a little stiff or uneven after finishing, you can gently steam block them with an iron held a few inches above the work. Let the steam relax the stitches, then coax the ruffles into the shape you want with your fingers and allow them to dry fully.

Part Three: The Tentacles

The tentacles are where your jellyfish really comes to life, and there are several approaches depending on the look you want.

Basic Hanging Tentacles:

Cut lengths of yarn in your tentacle color, approximately 8 to 12 inches long each. The longer your yarn, the longer your tentacles. For a baby jellyfish, 8 to 10 inches works beautifully.

Using a yarn needle or a crochet hook, fold each length in half and pull the looped end through a stitch at the base of the bell (between rounds 15 and 16, just below the second ruffle). Pull the tails through the loop to create a lark’s head knot attachment. Repeat around the base of the bell until you have as many tentacles as you like. Six to ten tentacles give a full, lush look without being overwhelming.

Trim the ends to even them out, or trim them at varying lengths for a more natural, asymmetrical effect.

Crocheted Tentacles:

If you prefer tentacles with a little more structure and curl, try this simple crocheted version.

Using your tentacle color, chain 25 (or more for longer tentacles). Starting in the second chain from the hook, work 2 sc in each chain back to the starting point. The extra stitches cause the work to spiral and curl naturally as you go.

Fasten off and leave a tail for attaching. Sew or tie several of these around the base of the bell.

Curly Wrapped Tentacles:

For the curliest tentacles possible, wrap a long length of yarn tightly around a thin pencil or a wooden skewer from one end to the other. Knot the ends lightly to hold them in place. Dip the pencil and yarn in warm water, then let it dry completely before unwrapping. The dried yarn will hold a tight corkscrew curl that gives your jellyfish a wonderfully whimsical look.

Mix and match tentacle styles for an especially playful finished piece.

Finishing Touches

Once your tentacles are attached, step back and look at your jellyfish as a whole. This is the moment to make any small adjustments before you call it complete.

If the bell looks lopsided, try redistributing the stuffing gently from the outside with your fingers. If the ruffles are lying flat against the dome, angle them slightly downward by pinching and holding them for a moment — with acrylic yarn especially, a little heat setting with steam can help them hold a specific shape.

For a nursery mobile, attach a length of clear fishing line or a piece of ribbon to the very top of the bell by weaving it securely through several stitches at the crown. This gives a clean, minimal look that lets the jellyfish appear to float.

For a stuffed toy, add a gentle embroidered smile between the eyes using a single strand of black or dark yarn. A small upward curved line about 4 stitches wide works well. Some crocheters also add tiny rosy cheek spots using a small amount of pink yarn or even a touch of blush makeup powder gently applied with a clean brush — this gives the jellyfish an adorably bashful expression.

Customization Ideas

One of the greatest pleasures of this pattern is how much room it leaves for personalization. Here are some ideas to spark your creativity.

Color choices: Pastel colors like lavender, mint, and soft pink give a nursery-ready look. Bright, saturated colors like coral, turquoise, and sunshine yellow feel more playful and toy-like. For a more realistic ocean-inspired piece, try translucent or iridescent yarn if you can find it, or opt for soft blues and purples with white ruffles.

Size variations: Work this pattern with fingering weight yarn and a 2mm hook for a tiny, delicate jellyfish about 2 inches tall. Scale up to a bulky yarn and a 6mm hook for a large, plush version that could serve as a throw pillow accent or a child’s snuggle buddy. The structure of the pattern scales with your yarn and hook choices.

Facial expressions: Experiment with different eye placements and embroidered mouth shapes to change the mood of your jellyfish. Eyes placed closer together with a slight droop give a sleepy expression. Wide-set eyes with no mouth at all look elegant and modern. Tiny crossed eyes with a small open mouth look hilariously surprised.

Seasonal and holiday versions: Make Halloween jellyfish in black and orange with golden eyes. Create Christmas ornament versions in red and white with a loop of ribbon at the top. Valentine’s Day calls for pink and red with tiny heart-shaped eyes.

Amigurumi mobile sets: Make five or six jellyfish in coordinating colors and hang them at different heights from a wooden ring or a piece of driftwood for a stunning handmade mobile. Pair them with crocheted stars, moon shapes, or coral pieces for an underwater nursery theme.

Tips for Success

A few tried-and-true tips to help your project go smoothly from beginning to end.

Work tightly and consistently throughout the bell. Loose tension in amigurumi allows the stuffing to show through the stitches, which creates a speckled, untidy look that most makers want to avoid. If you find yourself working too loosely, try going down half a hook size.

Use a stitch marker religiously. In continuous rounds, it is very easy to accidentally add or lose a stitch without realizing it until several rounds later. Moving your marker at the start of every single round takes only a second and saves an enormous amount of frustration.

Count your stitches at the end of every increase or decrease round. Amigurumi patterns are very sensitive to stitch count — even one missed increase can cause the dome to pull in unevenly, throwing off the entire shape.

Close the magic ring firmly. A loose magic ring leaves a small hole at the very top of the dome that is difficult to close neatly after the fact. After pulling the ring closed, tug on the starting tail one more time to snug it up completely, then weave the tail in carefully to prevent it from loosening as you work.

When attaching safety eyes, try placing them with pins or small amounts of removable tape before committing. Once the washer is pressed on, safety eyes are genuinely difficult to remove without damaging the eye or the yarn. Spending an extra minute with placement is always worthwhile.

Sharing Your Finished Jellyfish

Once your baby jellyfish is complete, please consider sharing it with the crochet community. Tag your finished makes on social media so other makers can see your version and find inspiration in your color choices and styling. The crochet community is wonderfully generous with encouragement, and seeing how differently this pattern turns out in different hands is one of the great joys of sharing free patterns.

If you make this pattern for a baby shower or as a nursery gift, it photographs beautifully in natural light against a soft background. A white linen cloth, a wicker basket filled with yarn, or a simple wooden surface all make excellent backdrops that let the jellyfish take center stage.

This pattern is free for personal use and for making finished items to sell at craft fairs or in small-scale shops. If you do sell finished pieces made from this pattern, a credit or link back to the original is always appreciated.

There is something quietly satisfying about finishing an amigurumi project — that moment when you attach the last tentacle, fluff the ruffles into place, and set your finished creature down to look at it from a few feet away. The baby jellyfish with ruffle details is the kind of project that rewards you with exactly that feeling, again and again, in every color of the rainbow. Happy crocheting.