There are so many great ways to wear an adult shark costume: a piggyback that looks like a shark is carrying you, a gray fin on a headband, or a full inflatable shark from our adult range. We cover each look, plus adult octopus and lobster costumes and sea creature costumes for kids. Our table lists the pack contents, sizing, and care for all eight picks, and every costume goes through over 30 measurement checks. Our Adult Octopus Costume is one size and slips on over your own clothes.
Between April 22 and October 10, 2026, more than half of the orders for our shark, octopus, and lobster costumes on morphsuits.com included a shark, kids' or adult. Sharks lead here for that reason, and the kids' sharks have their own section below. For the whole range, browse our animal costumes, and our best Halloween costumes guide pulls the season together.
Table of Contents
- Which sea creature costume gives which look?
- What are the adult shark costume options?
- Is the octopus costume for women, men, or both?
- How do you make a lobster costume?
- Which shark and lobster costumes work for kids?
- What can you add to a sea creature costume?
- Frequently asked questions
Which sea creature costume gives which look?
Each costume below gives a different look, and this table puts the pack contents, sizing, and care for all eight side by side.
| Costume | In the pack | Sizing | Care |
|---|---|---|---|
| Shark Piggyback Costume | One blue shark piggyback outfit with self-stuff legs | One size, designed for a variety of adult body types | Hand wash in cool water, air dry flat |
| Shark Fin Headband for Adults | One gray shark fin on a fabric-wrapped headband; single, or packs of 2, 4, 6, or 12 | One size, adults 14 and over | Spot clean only |
| Adult Octopus Costume | One blue octopus tabard | One size, designed to fit most adults | Hand wash in cool water, air dry flat |
| Adult Lobster Claws and Headband Set | Padded headband with two poseable antennae, plus a pair of foam claw mitts | One size, designed to fit most adults | Spot clean only, air dry fully |
| Adult Crazy Crab Hat | One hat with poseable claws, legs, and eyes; single, or packs of 2, 4, 6, or 12 | One size, hook and loop closure at the back | Spot clean only |
| Kids Lil' Man Eating Shark Inflatable Costume | Inflatable costume with built-in fan and battery pack (4 AA, not included) | One size, designed to fit most children; size chart in the product images | Hand wash, fan and battery pack removed, air dry |
| Kids Hammerhead Shark Tunic Costume | Gray plush tabard tunic with shark head and tail | 7-9 yrs and L (10-12 yrs) | Hand wash in cool water, air dry flat |
| Kids Inflatable Giant Lobster Costume | Inflatable costume with built-in fan (4 AA, not included) | Sized by height, 120 to 155 cm (about 47 to 61 inches) | Hand wash, batteries and fan removed, air dry |
What are the adult shark costume options?
Our adult shark looks come in three effects: a piggyback, a fin, and an inflatable. The piggyback and the fin are below, and the inflatables follow.
The one that looks like the shark is carrying you
The Shark Piggyback Costume is one blue shark piggyback outfit with self-stuff legs, in 100% polyester. It is one size, designed for a variety of adult body types, and it is worn over your regular clothes and fastens around the torso. Wash it by hand in cool water without wringing, then air dry it flat.
The light nod: a fin on a headband
The Shark Fin Headband for Adults is a gray shark fin measuring 5.5 inches on a soft, fabric-wrapped headband, made for adults 14 and over. It comes as a single headband or in packs of 2, 4, 6, or 12, so a whole group can be sharks. Spot clean only.
For a full shark body, look to our adult inflatable costumes. Our guides to the best inflatable costumes and the best animal costumes for adults put the ones we have already featured side by side.
Is the octopus costume for women, men, or both?
The octopus costume is for women and men alike: it is one size, designed to fit most adults, and it sits over your own clothes.
The one that pulls straight on over your head
The Adult Octopus Costume is one blue octopus tabard in 100% polyester. There is nothing to fasten: you pull it on over your head, which makes it quick to put on. Hand wash it in cool water with mild detergent, then air dry it flat away from direct heat or sunlight.
Wear a plain long-sleeve top underneath, and add face paint if you like. The FDA suggests trying a dab of new face paint on your arm for a couple of days to check for an allergic reaction (FDA, novelty makeup). If someone asks what you are, you can tell them an octopus has three hearts: two move blood to the gills and the third pumps it around the rest of the body (National Wildlife Federation).
How do you make a lobster costume?
A red outfit plus claws and antennae makes a great lobster costume, and our lobster set supplies the claws and antennae in one pack.
Claws and antennae in one set
The Adult Lobster Claws and Headband Set has a padded headband with two poseable antennae and a pair of soft foam claw mitts with an open back, so hands slip in and out easily. It is one size, designed to fit most adults. Wear it with a red top, red pants, or an all-red outfit. Spot clean only, air dry fully, and store flat so the antennae and claws keep their shape.
Red is a great lobster costume color, though NOAA Fisheries notes that live American lobsters are mostly olive-green or greenish-brown, not the red of a cooked one (NOAA Fisheries, American lobster). For a full-body lobster, the best inflatable costumes guide and the best animal costumes for adults guide each cover one.
Which shark and lobster costumes work for kids?
Our three kids' picks are an inflatable shark, a plush hammerhead tunic, and an inflatable lobster. All of our kids' products are safety tested by accredited labs. Each pick has its own sizing rule, so check the line under each one. More kids' picks are in our best animal costumes for kids and best kids' inflatable costumes guides.
The inflatable shark that puffs up in about a minute
The Kids Lil' Man Eating Shark Inflatable Costume inflates in around 60 seconds and stays inflated for up to 4 hours on a full battery. The built-in fan runs on a battery pack that takes 4 AA batteries, which are not included. It has adjustable straps and a built-in pocket, and it pulls on over regular clothes. It is one size, designed to fit most children, with a size chart in the product images.
The plush hammerhead tunic
The Kids Hammerhead Shark Tunic Costume is a gray plush tabard with a shark head, featuring realistic eyes and teeth, and a shark tail, in 100% polyester. The size options are 7-9 yrs and L (10-12 yrs), so check your child's age against them and the size guide for height. Layer it over a plain gray long-sleeve top and leggings for a warmer look, then hand wash it in cool water and air dry it flat.
The inflatable lobster, sized by height
The Kids Inflatable Giant Lobster Costume has a built-in fan, so no separate pump, and over 4 hours of battery life on 4 AA batteries, which are not included. It is sized by height, from 120 to 155 cm (about 47 to 61 inches), so measure your child before ordering. A built-in pocket holds a phone or small valuables. Neither inflatable includes batteries, so buy a spare set.
What can you add to a sea creature costume?
You can add a hat, a headband, or face paint, and the pack sizes let a whole group wear the same piece. You will not be the only one shopping: the National Retail Federation expects 71% of Halloween shoppers to spend a combined $4.4 billion on costumes in 2026 (NRF, 2026 Halloween survey).
A crab hat for the group
The Adult Crazy Crab Hat has poseable claws, legs, and eyes and an adjustable hook and loop closure at the back. Choose a single hat or a pack of 2, 4, 6, or 12. It is spot clean only.
Frequently asked questions
What is the best shark costume for adults?
We have three great shark looks for adults, so the best one is the look you feel like wearing. The Shark Piggyback Costume looks like a shark is carrying you, the Shark Fin Headband for Adults is a light nod that comes in packs of up to 12 for a group, and our adult inflatable range covers the full shark body.
Is the octopus costume for women or men?
Both. The Adult Octopus Costume is one size, designed to fit most adults, and it is a tabard that sits over your own clothes, so it works for women and men alike. There are no fastenings: you pull it on over your head.
What goes with a lobster costume?
A red top, red pants, or an all-red outfit goes with the Adult Lobster Claws and Headband Set, which supplies the antennae headband and a pair of foam claw mitts. For a group, add Adult Crazy Crab Hats, which come in packs of 2, 4, 6, or 12.
What size is the kids hammerhead shark costume?
The Kids Hammerhead Shark Tunic Costume comes in 7-9 yrs and L (10-12 yrs), so check your child's age against those two sizes, and the size guide for height, before ordering. It is a plush tabard that goes over everyday clothing.
How long does a kids inflatable shark stay inflated?
The Kids Lil' Man Eating Shark Inflatable Costume inflates in around 60 seconds and stays inflated for up to 4 hours on a full battery. The built-in fan runs on a battery pack that takes 4 AA batteries, which are not included.
How do you wash a sea creature costume?
Hand wash the fabric costumes in cool water, then air dry them flat away from direct heat; do not machine wash them. For the kids' inflatables, remove the battery pack and fan unit first, hand wash, and air dry completely. Hats, headbands, and claw mitts are spot clean only.
