shark boy costume
Skip itA small market ($0/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$34.40avg listing price — sweet spot $15–$100
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Brand share
Good62%top-5 brand share — brands hold most of the demand
Review moat
Good671.86avg incumbent reviews — the moat a new listing must climb
Competition
Good43%top-5 click share — leaders hold, buyers still browse
Price range
Good$9.62–$131.79cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+11.5%90-day search growth — must beat 0% to launch
Returns
Bad9.3%return rate — above 6% kills the launch gate
Market size
Bad$0$0/yr · 192K searches
Conversion
Bad0.0%search→purchase rate — share of searches ending in a sale
Competition
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.Brands
23 rising
Sellers
28
Top-5 brand share
62%
Open market
34%
- Fun Costumes22%
- Touchat18%
- Lucky2Buy8%
- JUOLOET7%
- inkArts6%
- JCJ4%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 36 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Touchat Shark Blanket for Adult & Kids Super Soft Cozy Flannel Throw Wearable Blanket Cartoon Animals Shark Onesie Hoodie Sleeping Bag Cosplay Shark Costume Blanket Gifts for Shark Lovers (Blue M)
Touchat$18.124.5★1,252 rev
Lucky2Buy Womens One-Piece High Cut Superhero Cosplay Leotard Bodysuit Teddy Swimsuit Set
Lucky2Buy$20.304.1★190 rev
Official Shark Boy and Lava Girl Toddler Gray Shark Boy Costume Boys Superhero Jumpsuit Costume
Fun Costumes$58.064.5★330 rev
JCJ Halloween Shark Costumes Stitch Onesie Pajamas for Kids Shark Sleeper Pajama Set Hooded for Boys Girls (9-10Y)
JCJ$26.733.8★56 rev
HSCTEK Shark Onesie Costume Kids Baby Pajamas Cosplay Sleepwear Clothes 16
HSCTEK$29.174.6★270 rev
Newest
by launch date
Mavoka Boys Costume Vest Trousers Set Kids Role Play Halloween Party Cosplay 11-12 Years Blue
Mavoka$19.682 rev
JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark X-Small
JUOLOET$25.57471 rev
TBGENIUS Shark Blanket Hoodie Onesie for Adults and Kids Cozy Flannel Shark Costume Shark Sleeping Bag
TBGENIUS$17.74213 rev
NEWCOSPLAY Unisex Adult Shark Onesie Pajamas Animal One Piece Halloween Costume Cosplay Sleepwear (Shark Medium)
NEWCOSPLAY$22.38138 rev
Newleafly Unisex Kids Shark Onesie Pajamas Soft Cozy Animal Onesie Halloween Cosplay Costume
Newleafly$24.6415 rev
Trending
90-day click momentumMavoka Boys Costume Vest Trousers Set Kids Role Play Halloween Party Cosplay 11-12 Years Blue
Mavoka$19.685.0★
LIOMENGZI Toddler Baby Boy Hooded Shark Summer Outfit Funny T-Shirt Shorts Set Infant Shark Clothes 6 12 18 Months 2T 3T(Blue Shark 12-18 Months)
LIOMENGZI$13.244.6★
haikyuu Kid Shark Costume Grey Pink Yellow Blue Fish Hoodie Boy Girl Halloween Birthday Party Dress Up (blue Small)
haikyuu$21.603.6★
ABENCA Shark Onesie Kids Animal Costume Girls Pajamas One Piece Plush Cosplay Halloween Christmas.Grey Shark.140
ABENCA$35.464.2★
NEWCOSPLAY Unisex Adult Shark Onesie Pajamas Animal One Piece Halloween Costume Cosplay Sleepwear (Shark Medium)
NEWCOSPLAY$22.384.5★
Demand & seasonality
Weekly Amazon search volume, last 89 weeks — +11.5% search growth over the last 90 days.Peak months: Sep, Oct, Nov · busiest ÷ quietest = 30.9×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The material itself is soft and cozy, and the design is really cute”
“Great gift”
“comfortable”
“Fit well”
“cozy for year round use”
“Good quality”
“Great Buy”
“As advertised”
“Material stays pretty soft”
“Adorable shark design”
What buyers complain about
“Pretty big”
“Ripped the first day”
“not well made”
“the seams were coming apart”
“Arrived with hole”
“Product description was way off”
“The material was very cheap”
“Thin material”
“Also there is NO WAY TO ZIP IT by yourself”
“not great product design”