Is shark fin for kids profitable to sell on Amazon United States?

The niche generates $13K/yr across 27 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +318.8%. Flapen's verdict: Worth a look (54/100).

How competitive is the shark fin for kids niche?

16 brands and 20 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 74% of demand.

What do buyers complain about in shark fin for kids?

Top complaints mined from reviews: Durability, Size-Overall, Battery Life. The return rate is 4.3%.

When does demand for shark fin for kids peak?

Demand peaks in Jun–Jul–Aug; the busiest month runs 24.5× the quietest.

What does it cost to enter the shark fin for kids niche?

Listings span $7.86–$74.78; the average listing price is $25.25 (sweet spot $15–$100). The average incumbent carries 781 reviews — the moat a new listing must climb.

shark fin for kids

Worth a look

Shows demand growing +318.8% this quarter, but a small market ($13K/yr) keeps it on the watch list.

Growth

Incredible+318.8%

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

Avg price

Incredible$25.25

avg listing price — sweet spot $15–$100

Price range

Great$7.86–$74.78

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Good781.07

avg incumbent reviews — the moat a new listing must climb

Competition

Good48%

top-5 click share — leaders hold, buyers still browse

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Brand share

Good74%

top-5 brand share — brands hold most of the demand

Returns

Okay4.3%

return rate — above 5% kills the launch gate

Conversion

Okay2.6%

search→purchase rate — share of searches ending in a sale

Market size

Bad$13K

$13K/yr · 20K searches

Signals Trending

According to Flapen's Amazon United States niche tracking, shark fin for kids is a $13K/yr Amazon United States market (20K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Worth a look — 54/100.

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

shark fin for kids market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: $13K–$19K; units × avg price
Conversion rate: 2.6%
Avg BSR: #2,521
Page quality: 0%
Prime: 93%
Sponsored: 89%
Out of stock: 5.0%
Avg brand age: 60 months
Avg seller age: 184 days

Competition & brand share

The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 rising

Sellers

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

48%

Top 20: 91%

Open market

22%

Foyinbet26%
Fin Fun25%
Fun Express11%
Sun Tails6%
Big Time Toys6%
Civaner4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +318.8% search growth over the last 90 days.

Peak months: Jun, Jul, Aug · busiest ÷ quietest = 24.5×

Open Trend

Top shark fin for kids 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

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

Foyinbet Kids Swim Fins Short Youth Flippers Swimming Training Fins for Lap Swimming and Training for Children Girls Boys Beginners XS

Foyinbet$28.844.6★1,689 rev

Shark Floatie: Pool Toy Swimming Aid and Flotation Device

Sun Tails$24.814.5★24 rev

Foyinbet Kids Swim Fins Kids Flippers Youth Swimmer Fins Swimming Training Fins for Lap Swimming for Child Girls Boys 3XS

Foyinbet$26.664.6★1,689 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

SHARKMAN Super Swimmer Shark Swim Gear for Kids Black Tip Mask with Built-in Goggles Dorsal Fin Flippers & Web Gloves NEW Improved Straps & Buckles Fun Costume Pool Toy Ages 4-12

Big Time Toys$24.062 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

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

Foyinbet Kids Swim Fins Short Youth Fins Swimming Flippers for Lap Swimming and Training for Children Girls Boys 4XS

Foyinbet$25.271,689 rev

2y ago

What buyers say about shark fin for kids

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

What buyers love

Fun/Entertainment Experience26%

“Great for fun at the pool”

Size-Overall18%

“They run true to size”

Quality-Overall10%

“Good quality toy”

Water Resistance7%

“This is the best water toy we have ever ordered”

Durability7%

“Durable”

Strength6%

“Its very sturdy”

Design-Overall5%

“Good build”

Value For Money4%

“Great price for fun in the water”

Strap/String Quality3%

“My son loves how it straps to his back”

Efficiency2%

“works really well”

What buyers complain about

Durability27%

“Breaks easily”

Size-Overall25%

“Too small”

Battery Life10%

“Batteries were replaced, still nothing”

Weight Heavy6%

“Its nose is too heavy”

Ease Of Use6%

“not very easy to put back on”

Top return reasons

Size-Overall80%

Functionality-Overall4%

Value For Money2%

Advertised Vs Actual Product2%

Battery Inclusion2%

Durability2%

Defective Material/Parts1%

Color1%

Strap/String Quality1%

Water Resistance1%

Common questions

Is shark fin for kids profitable to sell on Amazon United States?: The niche generates $13K/yr across 27 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +318.8%. Flapen's verdict: Worth a look (54/100).
How competitive is the shark fin for kids niche?: 16 brands and 20 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 74% of demand.
What do buyers complain about in shark fin for kids?: Top complaints mined from reviews: Durability, Size-Overall, Battery Life. The return rate is 4.3%.
When does demand for shark fin for kids peak?: Demand peaks in Jun–Jul–Aug; the busiest month runs 24.5× the quietest.
What does it cost to enter the shark fin for kids niche?: Listings span $7.86–$74.78; the average listing price is $25.25 (sweet spot $15–$100). The average incumbent carries 781 reviews — the moat a new listing must climb.