Is shark fin profitable to sell on Amazon United States?

The niche generates $75K/yr across 34 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +97.0%. Flapen's verdict: Worth a look (58/100).

How competitive is the shark fin niche?

23 brands and 33 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 61% of demand.

What do buyers complain about in shark fin?

Top complaints mined from reviews: Size-Overall, Compatibility-Overall, Durability. The return rate is 6.9% — above our launch gate.

When does demand for shark fin peak?

Demand peaks in Jul–Oct; the busiest month runs 12.2× the quietest.

What does it cost to enter the shark fin niche?

Listings span $7.86–$74.78; the average listing price is $24.04 (sweet spot $15–$100). The average incumbent carries 755 reviews — the moat a new listing must climb.

shark fin

Worth a look

Shows 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$24.04

avg listing price — sweet spot $15–$100

Growth

Great+97.0%

90-day search growth — must beat 0% to launch

Price range

Great$7.86–$74.78

cheapest 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

Good755.32

avg 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

Market size

Bad$75K

$75K/yr · 111K searches

Returns

Bad6.9%

return rate — above 5% kills the launch gate

Signals High Returns

According to Flapen's Amazon United States niche tracking, shark fin is a $75K/yr Amazon United States market (111K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Jul–Oct. Verdict: Worth a look — 58/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

shark fin market data

Units sold / yr: 4K–5K; avg 100–250/product
Revenue / yr: $96K–$120K; units × avg price
Conversion rate: 2.8%
Avg BSR: #1,286
Page quality: 0%
Prime: 94%
Sponsored: 85%
Out of stock: 4.3%
Avg brand age: 48 months
Avg seller age: 190 days

Competition & brand share

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.

Brands

23 rising

Sellers

Top-5 brand share

61%

Top 20: 97%

Top-5 click share

47%

Top 20: 84%

Open market

35%

Fin Fun22%
Foyinbet15%
Civaner9%
Fun Express9%
Holyzuel6%
Prsca4%

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×

Open Trend

Top shark fin search terms

shark fin63K/yr +67.7%2.5% conv.
shark fin for pool10K/yr +507.5%2.6% conv.
shark fins10K/yr +68.2%2.7% conv.
shark fin for swimming9K/yr +87.1%2.1% conv.
shark fin costume12K/yr -8.3%4.5% conv.
shark costume accessories6K/yr +10.9%0.6% conv.

All search terms

Top shark fin products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 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

4mo ago

Fin Fun Mermaidens - Adult Mermaid Tails for Swimming for Women with Monofin Extra Small Barracuda Black

Fin Fun$74.7816 rev

5mo ago

MELUMILU Snorkel Fins Swim Fins Travel Size Short Adjustable for Snorkeling Diving Adult Men Women Open Heel Swimming Flippers (Black)

MELUMILU$23.30137 rev

1y ago

ZHOSXRC Resin Floating Shark Head Garden Statue Realistic Scary Floating Shark Fin Pond Decor Floating Pond Ornament Realistic Yard Animal Art Lawn Ornament for Pool Pond (Fin)

ZHOSXRC$19.864 rev

2y ago

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$9.4042 rev

2y ago

What buyers say about shark fin

What buyers praise and complain about, mined from review topics.

What buyers love

Size-Overall26%

“They run true to size”

Quality-Overall17%

“Good quality”

Durability5%

“Durable”

Design-Overall5%

“Good build”

Strength4%

“Stands up nicely in a table”

Value For Money4%

“Great price for fun in the water”

Material Quality4%

“Great material”

Water Resistance4%

“The fins worked fine for swimming around on my float tube”

Fun/Entertainment Experience4%

“The design is fun and looks fantastic for parties, Halloween, or just playful dress-up”

Comfort-Overall4%

“comfortable”

What buyers complain about

Size-Overall38%

“Didnt fit my car even though it said it would fit my car”

Compatibility-Overall17%

“Does not fit Lexus NX series”

Durability7%

“Breaks easily”

Strap/String Quality7%

“Flippers: a clip that holds the strap broke first time using them”

Advertised Vs Actual Product6%

“Does not fit as advertised”

Quality-Overall4%

“Trash”

Adhesion/Stickiness2%

“Better adhesive”

Suitable For Outdoor1%

“So if this is a for an outdoor party, be warned”

Maintenance And Repair1%

“This does not replace it at all”

Weight Heavy1%

“The product was bulky”

Top return reasons

Size-Overall68%

Compatibility-Overall17%

Advertised Vs Actual Product3%

Defective Material/Parts2%

Functionality-Overall1%

Value For Money1%

Adhesion/Stickiness1%

Color1%

Strap/String Quality1%

Quality-Overall1%

Common questions

Is shark fin profitable to sell on Amazon United States?: The niche generates $75K/yr across 34 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +97.0%. Flapen's verdict: Worth a look (58/100).
How competitive is the shark fin niche?: 23 brands and 33 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 61% of demand.
What do buyers complain about in shark fin?: Top complaints mined from reviews: Size-Overall, Compatibility-Overall, Durability. The return rate is 6.9% — above our launch gate.
When does demand for shark fin peak?: Demand peaks in Jul–Oct; the busiest month runs 12.2× the quietest.
What does it cost to enter the shark fin niche?: Listings span $7.86–$74.78; the average listing price is $24.04 (sweet spot $15–$100). The average incumbent carries 755 reviews — the moat a new listing must climb.