Picture this: a mermaid plush that looks like she just swam out of a starlit ocean, complete with navy spiral curls, a silvery shell top, and a purple gradient tail that screams magic. That’s the Midnight Galaxy Mermaid Plush, and the free crochet pattern lets you make her yourself. She’s about 14 inches of pure amigurumi charm, perfect for intermediate crocheters who want something showy without losing their minds. Ready to dive in?
Why You Will Love This Crochet Pattern
This mermaid hits that sweet spot where sophistication meets pure whimsy. The color combo feels elegant yet playful, and those cascading spiral curls? They give her serious movement and texture.
The crocodile-style fins on the tail create a scale effect that looks way more complicated than it actually is. You work the head and body as one piece, the tail separately, then join everything at the end. Breaks are built in, which is a win when life gets chaotic.
Plus, she’s ridiculously customizable. Swap navy for teal, purple for coral, or go full rainbow on the hair. Make her yours. IMO, that’s the best part of any free crochet pattern.
Materials Needed
Grab your supplies first so you’re not mid-round hunting for yarn. You’ll need worsted weight (weight 4) in these amounts:
- Cream or beige for skin – about 80 yards
- Navy blue for hair and upper tail – around 100 yards
- Purple for lower tail and fins – roughly 60 yards
- Silver or light gray for the shell top – 15 yards
- White for the flower accent – just a scrap
- Black, pink, and brown for the face – tiny amounts
A 3.5mm (E/4) hook keeps the fabric tight so stuffing stays hidden. Add polyester fiberfill, 9mm black safety eyes, a yarn needle, stitch markers, scissors, and pins. Optional: pink chalk for cheeks and a dab of fabric glue for the hair.
Cotton blends give crisp stitch definition, but acrylic works great too if you want more color options. FYI, going down a hook size from the yarn label is the amigurumi secret sauce.
Stitch Abbreviations and Definitions
Before you start, here’s the quick cheat sheet. Keep it handy.
- ch = chain
- sl st = slip stitch
- sc = single crochet
- inc = increase (2 sc in same stitch)
- dec = invisible decrease (front loops only of next 2 stitches)
- FLO = front loop only
- BLO = back loop only
- MR = magic ring
These are your everyday amigurumi tools. The invisible decrease especially keeps things looking smooth instead of bumpy.
Gauge and Finished Size
Aim for 5 single crochets and 5 rows per inch in continuous rounds. Gauge isn’t make-or-break for plushies, but it helps her hit that 14-inch height from head to fin tips.
Too loose? Drop a hook size. Too tight? Go up one. Easy fix.
Pattern Notes Before You Begin
Work in continuous rounds unless the pattern says otherwise. No joining at the end of each round—just spiral up and move your stitch marker as you go. Trust me, it prevents counting disasters.
Stuff firmly as you work. Waiting until the end usually ends in frustration. Keep the right side facing out so the smoother stitches show.
She’s intermediate-friendly if you already know basic amigurumi. Separate pieces mean you can pause whenever.
Head and Body Instructions
Start at the top of the head with cream yarn and work straight down to the waist.
Round 1: 6 sc in MR (6 sts)
Round 2: Inc in each st (12 sts)
Round 3: [Sc 1, inc] 6 times (18 sts)
Round 4: [Sc 2, inc] 6 times (24 sts)
Round 5: [Sc 3, inc] 6 times (30 sts)
Round 6: [Sc 4, inc] 6 times (36 sts)
Round 7: [Sc 5, inc] 6 times (42 sts)
Rounds 8–15: Sc around (42 sts)
Pop the safety eyes in between rounds 10 and 11, about 8 stitches apart. Do it now while you still have room.
Round 16: [Sc 5, dec] 6 times (36 sts)
Round 17: [Sc 4, dec] 6 times (30 sts)
Round 18: [Sc 3, dec] 6 times (24 sts)
Stuff the head firmly.
Round 19: [Sc 2, dec] 6 times (18 sts)
Keep going with cream for the neck and body:
Rounds 20–22: Sc around (18 sts)
Round 23: [Sc 2, inc] 6 times (24 sts)
Round 24: [Sc 3, inc] 6 times (30 sts)
Rounds 25–32: Sc around (30 sts)
Round 33: [Sc 3, dec] 6 times (24 sts)
Round 34: Sc around (24 sts)
Stuff the body, fasten off, and leave a long tail for sewing later.
Here’s what the head and upper body look like once you reach the waist stage—tight stitches, eyes placed, ready for the next pieces.
render_generated_image with prompt is hyper detailed 8K resolution photograph of a partially crocheted cream-colored amigurumi mermaid head and body in progress, safety eyes inserted, soft fiberfill stuffing visible at the neck opening, navy yarn nearby, wooden table background, natural lighting, extreme close-up on single crochet texture, professional craft photography style, sharp focus, intricate yarn details orientation is portrait
Arms (Make 2)
Still cream yarn for these.
Round 1: 6 sc in MR (6 sts)
Round 2: [Sc 1, inc] 3 times (9 sts)
Rounds 3–18: Sc around (9 sts)
Stuff lightly, mostly in the hand area so the arms stay a little floppy. Flatten the opening, sew it closed, and leave a tail for attaching.
Tail Section
This is where the gradient magic happens. Start with navy for the upper tail.
Round 1: 6 sc in MR (6 sts)
Round 2: Inc around (12 sts)
Round 3: [Sc 1, inc] 6 times (18 sts)
Round 4: [Sc 2, inc] 6 times (24 sts)
Rounds 5–8: Sc around (24 sts)
Round 9: BLO sc around (24 sts) — this ridge becomes the waistband
Rounds 10–22: Sc around (24 sts)
Switch to purple at round 23.
Rounds 23–30: Sc around (24 sts)
Round 31: [Sc 2, dec] 6 times (18 sts)
Rounds 32–35: Sc around (18 sts)
Round 36: [Sc 1, dec] 6 times (12 sts)
Stuff as you go. Fasten off with a long tail.
Watch the color transition and the BLO ridge take shape—this is the part that makes her look like she belongs in a midnight ocean.
render_generated_image with prompt is hyper detailed 8K resolution close-up of crocheting the gradient mermaid tail, navy blue upper section transitioning to rich purple lower section, BLO ridge visible at waist, single crochet stitches in continuous rounds, hands holding the work, soft natural light, yarn texture ultra sharp, professional amigurumi process photo, 8K detail orientation is landscape
Tail Fins (Make 2)
Purple yarn again. These use a simple shaping method that gives a dimensional, scale-like look.
Foundation: Ch 12
Row 1: Sc in 2nd ch from hook and across, turn (11 sts)
Row 2: Ch 1, sc across, turn (11 sts)
Rows 3–6: Repeat Row 2
Then shape:
Row 7: Ch 1, dec, sc 7, dec, turn (9 sts)
Row 8: Ch 1, dec, sc 5, dec, turn (7 sts)
Row 9: Ch 1, dec, sc 3, dec, turn (5 sts)
Row 10: Ch 1, dec, sc 1, dec (3 sts)
Fasten off. Fold each fin in half lengthwise, whip stitch the sides, stuff lightly, and leave the top open. Attach them to the bottom of the tail, angled outward a bit.
See how the fins start flat and turn into that classic mermaid shape once folded and stuffed?
render_generated_image with prompt is hyper detailed 8K resolution step-by-step view of purple crochet mermaid tail fins being shaped and folded, one fin flat on table showing decrease rows, second fin folded and lightly stuffed, yarn needle and scissors nearby, wooden surface, crisp stitch definition, professional craft photography, extreme detail on yarn fibers orientation is portrait
Shell Top
Silver or light gray yarn for the little bra cups.
Each cup (make 2):
Round 1: 5 sc in MR (5 sts)
Round 2: Inc around (10 sts)
Round 3: [Sc 1, inc] 5 times (15 sts)
Flatten and sc 7 through both layers to close. On the first cup only, ch 8 for the connecting strap. Join the cups with slip stitches. Add a ch 15 tie to each outer edge so you can tie it around the back.
Hair
Navy yarn for the base cap and those gorgeous spiral curls.
Cap:
Round 1: 6 sc in MR (6 sts)
Round 2: Inc around (12 sts)
Round 3: [Sc 1, inc] 6 times (18 sts)
Round 4: [Sc 2, inc] 6 times (24 sts)
Round 5: [Sc 3, inc] 6 times (30 sts)
Round 6: [Sc 4, inc] 6 times (36 sts)
Round 7: [Sc 5, inc] 6 times (42 sts)
Rounds 8–12: Sc around (42 sts)
Don’t fasten off yet. The cap should sit over the top and back of the head.
For the curls (make 25–30): Ch 20. Starting in the 2nd ch from the hook, work 3 sc in each chain. It twists into a spiral on its own. Fasten off with a tail and sew them densely around the edge of the cap, layering for fullness.
This is the stage where the hair starts looking wild and wonderful—spirals everywhere.
render_generated_image with prompt is hyper detailed 8K resolution of navy blue spiral curl hair being attached to amigurumi mermaid head cap, multiple long twisted curls hanging, hands sewing one curl in place, cream face partially visible, soft studio lighting, ultra sharp yarn texture and individual stitches, professional crochet process photo orientation is landscape
Flower Hair Accessory
White yarn for a quick five-petal flower.
Ch 4, slip stitch to form a ring.
Round 1: [Ch 3, 2 dc in ring, ch 3, sl st in ring] 5 times.
Fasten off and sew it above one ear.
Facial Features
Keep it simple and sweet. Embroider thin curved brown eyebrows above the eyes with backstitch or satin stitch. Add a small curved pink or coral smile the same way.
A tiny dab of pink chalk or actual blush on the cheeks brings her to life. Less is more here.
Assembly Instructions
This is where she becomes a real mermaid. Take your time.
- Whip stitch the tail to the bottom of the body so the BLO ridge sits at the natural waist.
- Sew the arms at about round 25, angling them slightly forward.
- Pin the hair cap in place (top and back covered, face clear), then sew it down securely.
- Tie the shell top at bust level and tack it with a few hidden stitches if you want it permanent.
- Sew the flower onto the hair.
- Weave in every end through the stuffing so nothing shows.
Proper assembly is what separates “cute” from “wow.”
Here’s the almost-finished mermaid with everything attached except the final flower placement—ready for that last touch.
render_generated_image with prompt is hyper detailed 8K resolution of fully assembled Midnight Galaxy Mermaid Plush amigurumi, navy spiral curls, silver shell top, purple gradient tail with dimensional fins, cream body, sitting on wooden surface, soft natural light, intricate yarn texture, professional product photography style, sharp focus throughout orientation is portrait
Tips for Crochet Pattern Success
Mark every round like your yarn depends on it. Stuff firmer than you think—fiberfill compresses. Test eye placement with pins before locking in the safety eyes. A quick steam on individual pieces can smooth any wonky spots if you want, but it’s optional.
Make This Pattern Your Own
Change the hair to red, blonde, or pastels. Try a teal or sunset orange tail. Add beads or make a tiny seahorse friend.
The base pattern is solid, so play with it.
FAQ’s
Is this pattern really free?
Yes. The full written instructions are available right here so you can start today without buying anything extra.
What skill level do I need?
Intermediate. If you can single crochet in the round and have made at least one basic amigurumi, you’re good. The spiral curls and fins look fancy but use simple techniques.
Can I sell the finished mermaids?
Most designers allow finished items for sale with credit given. Always double-check the original designer’s terms if you plan to sell.
How long does it take to finish?
Depends on your speed, but most people finish in a weekend or two of focused sessions. The separate pieces make it easy to chip away at.
What if my gauge is off?
She’ll just be a little bigger or smaller. Adjust your hook size and keep going—amigurumi is forgiving that way.
Can I use different yarn weights?
You can, but the finished size and proportions will change. Stick with worsted for the intended 14-inch height.
Thank You for Making With Me
Thanks for picking up this pattern and giving the Midnight Galaxy Mermaid a go. Watching her come together stitch by stitch is pure joy, and I hope you feel the same when you hold the finished plush.
Share your version when you’re done—tag it so the rest of us can cheer you on. Happy crocheting, and may your yarn stay tangle-free.
