Amigurumi Under the Sea Mobile – FREE Crochet Pattern

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Bring the magic of the ocean to life with this Amigurumi Under the Sea Mobile crochet pattern! Perfect for nurseries, playrooms, or anyone who dreams of seaside adventures, this enchanting mobile features a delightful collection of sea creatures—think smiling jellyfish, curious crabs, gentle turtles, and playful fish—all suspended in a whimsical underwater dance. Whether you’re crafting a handmade baby shower gift or adding a splash of ocean charm to your own space, this pattern lets you stitch up a floating world of aquatic wonder. 🐠🐙🌊

Designed for creativity and storytelling, this pattern invites you to mix soft pastels or bold brights, experiment with textures, and personalize each sea friend with expressive details like tiny fins, sleepy eyes, or even a sparkle of embroidery. Hang them from a wooden hoop or driftwood for a natural touch, and watch as your mobile sways gently like waves in the sea. This Amigurumi Under the Sea Mobile is a joyful and satisfying project—perfect for bringing a tide of handmade magic to every stitch! 💖🧶✨

A crochet mobile featuring a blue whale, a green turtle, and a starfish on a wave, with pink jellyfish hanging above them, set in a light blue room.

🌊 Under the Sea Mobile Crochet Pattern

Bring ocean dreams to life with this adorable baby mobile featuring a whale, sea turtle, starfish, jellyfish, and a wavy water base! These sweet sea creatures are ideal for nursery decor, crib mobiles, or ocean-themed gifts.

✨ Skill Level

Intermediate
Includes amigurumi shaping, spiral tentacles, surface embroidery, and mobile assembly.

📏 Finished Sizes (Approx.)

Whale: 18–20 cm (7–8 in)
Turtle: 10–12 cm (4–5 in)
Jellyfish: 14–16 cm (5½–6½ in) including tentacles
Starfish: 7 cm (2¾ in)
Wave Base: 25–30 cm (10–12 in) wide, gently curved

🧶 Materials

Yarn (DK / Light Worsted – matte cotton preferred)

Light blue + cream – whale
Chartreuse / soft green – turtle body
Medium brown + cream – turtle shell
Dusty pink – jellyfish
Bright orange – starfish
Dark blue, medium blue, light blue – wave base
White – whale water spout accents

Tools & Notions

2.5–3.0 mm crochet hook
Polyester fiberfill
6 mm safety eyes (or embroidered eyes)
Tapestry needle
Stitch markers
Strong cotton cord or nylon line (for hanging)
Wooden hoop (25–30 cm diameter)

🧵 Abbreviations (US Terms)

MR – magic ring
ch – chain
sc – single crochet
hdc – half double crochet
dc – double crochet
tr – treble crochet
inc – increase
dec – invisible decrease
sl st – slip stitch
FO – fasten off

🐳 Whale

Body (Light Blue – worked in continuous rounds)

MR, 6 sc (6)
inc ×6 (12)
(sc, inc) ×6 (18)
(2 sc, inc) ×6 (24)
(3 sc, inc) ×6 (30)
(4 sc, inc) ×6 (36)

Rounds 7–19: sc around (36)

(4 sc, dec) ×6 (30)
Round 21: sc around
(3 sc, dec) ×6 (24)
Round 23: sc around
(2 sc, dec) ×6 (18)
(sc, dec) ×6 (12)

Stuff firmly, shaping into a smooth oval.
FO and close.

Belly (Cream – Oval Panel)

Ch 7

Round 1: sc in 2nd ch, sc 4, 3 sc in last ch, rotate, sc 4, 2 sc in first ch (14)
Round 2: inc, sc 4, inc ×3, sc 4, inc ×2 (22)
Round 3: sc around (22)

FO, leave long tail.
Sew neatly onto underside, slightly forward-facing.

Side Fins (Make 2 – Light Blue)

MR, 6 sc
(sc, inc) ×3 (9)
Rounds 3–5: sc around
Flatten lightly. FO.

Attach low on the body, angled gently downward.

Tail Fluke (Single Piece – Light Blue)

MR, 6 sc
inc ×6 (12)
(sc, inc) ×6 (18)
(2 sc, inc) ×6 (24)
Round 5: sc around

Flatten horizontally and pinch center slightly before sewing to body.

Water Spout (White – Soft Loops)

Make 2 pieces:

Ch 14, 2 sc in each ch back
FO.

Sew together at base and attach to top center of whale head.

Face

Eyes: 6 mm safety eyes between rounds 10–11, spaced 6 stitches apart
Mouth: optional tiny embroidered stitch in cream or light gray

🐢 Turtle

Head (Green)

MR, 6 sc
inc ×6 (12)
(sc, inc) ×6 (18)
Rounds 4–7: sc around

Insert eyes between rounds 4–5.
(dec, sc) ×6 (12)
FO, stuff lightly.

Belly (Green)

MR, 6 sc
inc ×6 (12)
(sc, inc) ×6 (18)
(2 sc, inc) ×6 (24)
Round 5: sc around
FO.

Shell (Brown)

MR, 6 sc
inc ×6 (12)
(sc, inc) ×6 (18)
(2 sc, inc) ×6 (24)
(3 sc, inc) ×6 (30)

FO.

Shell Pattern (Cream – Surface Embroidery)

Embroider 1 central hexagon with 5 surrounding hexagons using chain stitch.

Flippers (Make 4 – Green)

MR, 6 sc
(sc, inc) ×3 (9)
Rounds 3–5: sc around
Flatten and FO.

Assembly

Sew shell to belly
Insert head at front
Attach 2 flippers front, 2 back
Embroider a small curved smile

🌸 Jellyfish (Make 2)

Bell (Dusty Pink)

MR, 6 sc
inc ×6 (12)
(sc, inc) ×6 (18)
(2 sc, inc) ×6 (24)
(3 sc, inc) ×6 (30)
Rounds 6–8: sc around

Ruffle Edge

sl st, ch 3, sl st in same stitch around.

Stuff very lightly. FO.

Tentacles (9–10 per jellyfish)

Ch 30
2 sc in each ch back (tight spiral)
FO.

Attach evenly around the bell edge.

⭐ Starfish

MR, 5 sc
inc ×5 (10)

For each arm (×5):

Ch 6
sl st in 2nd ch, sc, sc, hdc, dc
sl st into next body stitch

FO.

🌊 Wave Base (Single Sculpted Piece)

Foundation

Ch 52

Rows 1–3 (Dark Blue): sc across
Rows 4–5 (Medium Blue): sc across
Rows 6–7 (Light Blue): sc across

Wave Shaping

Row 8: sc 3, hdc 2, dc 3, hdc 2, sc 3 repeat
Row 9: sc, hdc, dc, tr, dc, hdc, sc, sl st repeat

FO.

Gently curve into a rolling wave shape.
Lightly tack ends to maintain arc.

🔗 Hanging & Assembly

Whale: hangs freely from head
Jellyfish: suspended higher than whale
Turtle + starfish: sewn directly onto wave base
Wave base: attached to lower section of hoop

Top hanger:

4 equal cords tied evenly around hoop
Gather and knot securely at center

⚠️ Safety Notes

Hang out of baby’s reach
Secure all knots and seams firmly
Remove mobile once baby can sit or reach

🌼 Final Note

This under-the-sea mobile is designed to feel soft, calm, and balanced, with rounded forms and gentle motion that soothe rather than stimulate. Every element flows naturally, creating a peaceful ocean scene perfect for a nursery or heartfelt handmade gift.

Enjoy crafting your little ocean world 🌊🐳🐢✨