Is shark costume profitable to sell on Amazon United States?

The niche generates $698K/yr across 18 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +1.7%. Flapen's verdict: Skip it (42/100).

How competitive is the shark costume niche?

8 brands and 13 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 95% of demand.

What do buyers complain about in shark costume?

Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 9.2% — above our launch gate.

When does demand for shark costume peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 24.5× the quietest.

What does it cost to enter the shark costume niche?

Listings span $17.77–$42.24; the average listing price is $28.03 (sweet spot $15–$100). The average incumbent carries 1,422 reviews — the moat a new listing must climb.

shark costume

Skip it

High returns (9.2%) — this niche doesn't clear our bar today.

Avg price

Incredible$28.03

avg listing price — sweet spot $15–$100

Price range

Incredible$17.77–$42.24

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

Market size

Good$698K

$698K/yr · 1.6M searches

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Good1,422.33

avg incumbent reviews — the moat a new listing must climb

Competition

Okay63%

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

Growth

Okay+1.7%

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

Conversion

Bad1.6%

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

Brand share

Bad95%

top-5 brand share — brand-locked demand

Returns

Bad9.2%

return rate — above 5% kills the launch gate

Signals High Returns

According to Flapen's Amazon United States niche tracking, shark costume is a $698K/yr Amazon United States market (1.6M searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 42/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

shark costume market data

Units sold / yr: 25K–30K; avg 2,000–2,500/product
Revenue / yr: $701K–$841K; units × avg price
Conversion rate: 1.6%
Avg BSR: #3,701
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 7.7%
Avg brand age: 35 months
Avg seller age: 176 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 falling

Sellers

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

63%

Top 20: 100%

Open market

inkArts35%
Touchat34%
JUOLOET17%
Gudina6%
TBGENIUS4%
Poptrend2%
Open — no brand owns it (2 brands, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +1.7% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 24.5×

Open Trend

Top shark costume search terms

shark onesie431K/yr -2.5%1.2% conv.
shark costume466K/yr +16.8%0.5% conv.
shark onesie adult198K/yr -25.6%1.4% conv.
shark pajamas53K/yr +14.1%0.4% conv.
shark costume adult123K/yr +16.4%0.7% conv.
shark blanket onesie19K/yr +66.7%2.6% conv.
shark onsie53K/yr -3.2%1.3% conv.
shark pjs25K/yr +37.1%0.4% conv.
shark outfit17K/yr +65.3%0.5% conv.
shark suit14K/yr +11.1%1.1% conv.

All search terms

Top shark costume 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 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie

inkArts$20.144.2★4,782 rev

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$18.134.5★1,254 rev

Touchat Shark Blanket Hoodie Onesie Wearable Blankets Hoodie Adult Warm Flannel Throw Blanket Tail Sleeping Bag Cartoon Costume Shark Onesie Funny Gifts for Adults (Pink M)

Touchat$20.154.5★648 rev

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Small

JUOLOET$29.974.6★473 rev

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Medium

JUOLOET$28.174.6★473 rev

Newest

by launch date

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark XX-Large

JUOLOET$26.61473 rev

9mo ago

TBGENIUS Shark Blanket Hoodie Onesie for Adults Cozy Flannel Shark Costume Shark Sleeping Bag

TBGENIUS$17.77215 rev

10mo ago

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Small

JUOLOET$29.97473 rev

1y ago

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Medium

JUOLOET$28.17473 rev

1y ago

JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Large

JUOLOET$28.23473 rev

1y ago

What buyers say about shark costume

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

What buyers love

Gifting Purpose16%

“Great gift”

Soft Feel14%

“Very soft”

Comfort-Overall14%

“It is so comfortable”

Warmth11%

“quite warm although it's a bit thin”

Size-Overall10%

“Fit perfect”

Quality-Overall7%

“Good quality”

Value For Money5%

“the sale price was right”

Advertised Vs Actual Product2%

“As described”

Fun/Entertainment Experience2%

“Fun addition to our blow up costumes”

Material Quality2%

“Material stays pretty soft”

What buyers complain about

Size-Overall35%

“Poor fit”

Durability12%

“does not last”

Quality-Overall7%

“not well made”

Stitch/Finish/Polish6%

“Weak seams”

Gap/Hole5%

“there's two holes in it”

Advertised Vs Actual Product3%

“I wish they depicted these features”

Material Quality2%

“The material was very cheap”

Thin2%

“Thin material”

Smell1%

Touch/Button Controls1%

“when you clip the button it looks even worse”

Top return reasons

Size-Overall62%

Length12%

Gap/Hole3%

Advertised Vs Actual Product3%

Material Quality3%

Stitch/Finish/Polish2%

Sleeve Fit1%

Thigh Fit1%

Shoulder Fit1%

Arm Fit1%

Common questions

Is shark costume profitable to sell on Amazon United States?: The niche generates $698K/yr across 18 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +1.7%. Flapen's verdict: Skip it (42/100).
How competitive is the shark costume niche?: 8 brands and 13 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 95% of demand.
What do buyers complain about in shark costume?: Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 9.2% — above our launch gate.
When does demand for shark costume peak?: Demand peaks in Sep–Oct–Nov; the busiest month runs 24.5× the quietest.
What does it cost to enter the shark costume niche?: Listings span $17.77–$42.24; the average listing price is $28.03 (sweet spot $15–$100). The average incumbent carries 1,422 reviews — the moat a new listing must climb.

shark costume

shark costume market data

Competition & brand share

Demand & seasonality

Top shark costume search terms

Top shark costume products on Amazon

Top sellers

Newest

Trending

What buyers say about shark costume

What buyers love

What buyers complain about

Top return reasons

Common questions

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