shark fin
Worth a lookShows a sweet-spot price point ($24.04 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Avg price
Incredible$24.04avg listing price — sweet spot $15–$100
Growth
Great+97.0%90-day search growth — must beat 0% to launch
Price range
Great$7.86–$74.78cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good61%top-5 brand share — brands hold most of the demand
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Review moat
Good755.32avg incumbent reviews — the moat a new listing must climb
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Conversion
Okay2.8%search→purchase rate — share of searches ending in a sale
Returns
Bad6.9%return rate — above 6% kills the launch gate
Market size
Bad$75K$75K/yr · 111K searches
Competition
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
23 rising
Sellers
33
Top-5 brand share
61%
Open market
35%
- Fin Fun22%
- Foyinbet15%
- Civaner9%
- Fun Express9%
- Holyzuel6%
- Prsca4%
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 34 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fin Fun Shark Fin with Included Travel Bag - Adjustable Shark Costume for Swimming - Lightweight Snorkel or Pool Toy for Kids & Adults - (Gray)
Fin Fun$28.764.7★585 rev
Civaner Shark Costume Fin Gray Shark Costume Props Easy to Wear Accessories for Adults Dog Cosplay(Classic)
Civaner$9.214.4★336 rev
Fun Express Shark Fin Accessory - Shark Costume for Kids & Adults with Adjustable Elastic Straps | Shark Tail Back Fin for Halloween Costume Parties & Beach Events | Easy Shark Outfit Accessories
Fun Express$11.163.9★603 rev
Holyzuel Shark Adventure Costume Fin Gray Shark Accessory Costume Easy to Wear Play Costume Props for Adults Festivals Parties Events Cosplay Dive into a Sea of Fun
Holyzuel$9.403.8★42 rev
Prsca Kids Short Swim Fins Lap Training Flippers for Pool Youth Beginners
Prsca$22.004.8★392 rev
Newest
by launch date
SHARKMAN Super Swimmer Shark Swim Gear for Kids Great White Mask with Built-in Goggles Dorsal Fin Flippers & Web Gloves NEW Improved Straps & Buckles Fun Costume Pool Toy Ages 4-12
Big Time Toys$23.575 rev
Fin Fun Mermaidens - Adult Mermaid Tails for Swimming for Women with Monofin Extra Small Barracuda Black
Fin Fun$74.7816 rev
Klyyo Clyro 14 Pcs Shark Birthday Party Decoration Shark Fin Heads Party Decorations Iridescent Ocean Wave Mat for Under The Sea Ocean Birthday Summer Sea Decorations
Klyyo Clyro$14.043 rev
Breling 9 Pcs Shark Theme Party Supplies Table Centerpieces Floor Decoration Shark Fin Table Cloth Decor Water Decoration for Birthday Ocean Summer Sea Party Supplies
Breling$13.347 rev
MELUMILU Snorkel Fins Swim Fins Travel Size Short Adjustable for Snorkeling Diving Adult Men Women Open Heel Swimming Flippers (Black)
MELUMILU$23.30137 rev
Trending
90-day click momentum
Foyinbet Kids Swim Fins Kids Flippers Short Youth Swimming Fins for Lap Swimming and Training for Children Girls Boys 2XS
Foyinbet$27.574.6★
MELUMILU Snorkel Fins Swim Fins Travel Size Short Adjustable for Snorkeling Diving Adult Men Women Open Heel Swimming Flippers (Black)
MELUMILU$23.304.4★
Foyinbet Kids Swim Fins Short Kids Fins Youth Swimming Flippers for Lap Swimming Training for Children Girls Boys Beginners 2XS
Foyinbet$28.004.6★
Fin Fun Mermaidens - Adult Mermaid Tails for Swimming for Women with Monofin Extra Small Barracuda Black
Fin Fun$74.784.5★
Prsca Kids Short Swim Fins Lap Training Flippers for Pool Youth Beginners
Prsca$22.004.8★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +97.0% search growth over the last 90 days.Peak months: Jul, Oct · busiest ÷ quietest = 12.2×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“They run true to size”
“Good quality”
“Durable”
“Good build”
“Stands up nicely in a table”
“Great price for fun in the water”
“Great material”
“The fins worked fine for swimming around on my float tube”
“The design is fun and looks fantastic for parties, Halloween, or just playful dress-up”
“comfortable”
What buyers complain about
“Didnt fit my car even though it said it would fit my car”
“Does not fit Lexus NX series”
“Breaks easily”
“Flippers: a clip that holds the strap broke first time using them”
“Does not fit as advertised”
“Trash”
“Better adhesive”
“So if this is a for an outdoor party, be warned”
“This does not replace it at all”
“The product was bulky”