Infant Shark Costume
Make a splash with the cutest, coziest little shark on the block.
The infant shark costume is a beloved choice for Halloween, photo shoots, and dress-up play. Parents love it because it keeps babies warm and cozy while looking absolutely adorable. The look typically consists of a plush, hooded gray, blue, or yellow jumpsuit with a soft dorsal fin, felt teeth, and a white underbelly.
- Difficulty
- Easy
- Time
- ~10 min
- Budget
- $15–45
Try it on
See yourself as Infant Shark
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
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Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Infant Shark costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Infant Shark costume — one box instead of 4 pieces.
Plush shark bodysuit or sleep sack
A soft, zippered gray, blue, or yellow jumpsuit with a white belly panel and a stuffed tail attached to the back.
DIY: Use a gray or blue baby sleep sack or zippered footie pajama as the base.
Attached shark hood
A matching hood featuring soft felt teeth lining the rim, embroidered black eyes, and a small fin on top.
DIY: Glue white felt triangles for teeth and black felt circles for eyes onto a gray baby hoodie.
Soft dorsal fin
A stuffed fabric fin attached to the back of the bodysuit, matching the main color.
DIY: Cut two fin shapes from gray felt, stuff them lightly with cotton, and sew or fabric-glue them to the back of the pajamas.
Cozy undershirt or onesie
A simple cotton long-sleeve onesie worn underneath for comfort and warmth.
DIY: Use any solid-colored baby onesie you already have.
Rather not assemble it? See ready-made Infant Shark costumes at Spirit Halloween ↗
How to put it together
- 1
Dress your infant in a comfortable, breathable base layer like a cotton onesie and socks.
- 2
Slip the baby into the plush shark bodysuit or sleep sack, ensuring their arms and legs fit comfortably.
- 3
Carefully zip or snap the bodysuit closed, making sure the fabric does not pinch their skin.
- 4
Gently place the soft hood over the baby's head, adjusting it so it does not block their vision or face.
- 5
Check that the stuffed dorsal fin and tail are positioned correctly at the back and will not cause discomfort when the baby lies down.
Infant Shark for couples, groups, kids & more
- couples
- Dress up as a pair of deep-sea divers or a lifeguard and a baby shark.
- group
- Go as the entire 'Baby Shark' family with Mommy Shark, Daddy Shark, and Baby Shark costumes.
- kids
- Perfect for siblings to wear matching shark outfits in different colors like blue, pink, and yellow.
- pet
- Dress the family dog in a matching shark fin harness to join the ocean pack.
Tips
- Prioritize comfort and diaper access by choosing a costume with bottom snaps or a wide zipper.
- If trick-or-treating outdoors, layer warm fleece pajamas underneath the roomy shark suit.
- For newborn photos, a soft crochet shark swaddle and hat set is much more comfortable than a structured plush suit.
Infant Shark costume FAQ
- What should my baby wear under the shark costume?
- A simple, breathable cotton onesie or footie pajamas work best to prevent overheating while keeping them cozy.
- Is a plush shark costume safe for a sleeping baby?
- No, costumes with hoods, loose fabric, or stuffed parts should only be worn under direct supervision and removed before sleep.
- How do I make a DIY infant shark costume?
- Attach white felt triangles for teeth and black felt circles for eyes to a gray hooded sweatshirt, then fabric-glue a stuffed felt fin to the back.
Did you know? The massive viral success of the 'Baby Shark' song by Pinkfong in 2016 turned the classic shark look into one of the most popular infant costumes of the decade.