Is shark costume profitable to sell on Amazon United Kingdom?

The niche generates £77K/yr across 26 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -29.5%. Flapen's verdict: Skip it (42/100).

How competitive is the shark costume niche?

18 brands and 23 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 69% of demand.

What do buyers complain about in shark costume?

Top complaints mined from reviews: Size-Overall, Material Quality, Inflation/Deflation. The return rate is 4.5%.

When does demand for shark costume peak?

Demand peaks in Mar–Oct–Nov; the busiest month runs 10.3× the quietest.

What does it cost to enter the shark costume niche?

Listings span £9.04–£27.89; the average listing price is £18.82 (sweet spot $15–$100). The average incumbent carries 221 reviews — the moat a new listing must climb.

shark costume

Skip it

Soft demand (-29.5% this quarter) — this niche doesn't clear our bar today.

Review moat

Great221.35

avg incumbent reviews — the moat a new listing must climb

Avg price

Great£18.82

avg listing price — sweet spot $15–$100

Price range

Good£9.04–£27.89

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

Brand share

Good69%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Competition

Good52%

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

Returns

Okay4.5%

return rate — above 5% kills the launch gate

Conversion

Okay2.1%

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

Market size

Bad£77K

£77K/yr · 190K searches

Growth

Bad-29.5%

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

According to Flapen's Amazon United Kingdom niche tracking, shark costume is a £77K/yr Amazon United Kingdom market (190K searches/yr). The top 5 brands hold 69% of demand. Demand peaks in Mar–Oct–Nov. Verdict: Skip it — 42/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

shark costume market data

Units sold / yr: 3K–4K; avg 0–100/product
Revenue / yr: £56K–£75K; units × avg price
Conversion rate: 2.1%
Avg BSR: #614
Page quality: 0%
Prime: 100%
Sponsored: 92%
Out of stock: 14.7%
Avg brand age: 37 months
Avg seller age: 200 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 rising

Sellers

Top-5 brand share

69%

Top 20: 100%

Top-5 click share

52%

Top 20: 91%

Open market

27%

TBGENIUS35%
FXICH13%
COOKY.D11%
FUNFOCUS6%
Poptrend5%
Generic4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -29.5% search growth over the last 90 days.

Peak months: Mar, Oct, Nov · busiest ÷ quietest = 10.3×

Open Trend

Top shark costume search terms

shark costume72K/yr -27.2%1.3% conv.
shark costume kids30K/yr -49.2%0.7% conv.
inflatable shark costume23K/yr +23.6%3.3% conv.
kids shark costume13K/yr -33.0%1.3% conv.
shark costume adult13K/yr -8.9%2.2% conv.
shark outfit7K/yr +4.8%1.4% conv.
shark inflatable costume7K/yr -17.8%5.5% conv.
blow up shark costume4K/yr +22.4%2.3% conv.
inflatable shark costume kids9K/yr -69.4%2.5% conv.
kids inflatable shark costume4K/yr -67.8%3.0% 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

TBGENIUS£20.124.4★229 rev

FXICH Inflatable Costume Adult shark costume- Funny Dress Party Costume for Adult Halloween blue

FXICH£19.064.6★1,394 rev

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

TBGENIUS£15.934.4★229 rev

COOKY.D Kids Hooded Pyjamas Halloween Family Gaming Costume Shark 9-10 Yrs

COOKY.D£19.074.4★66 rev

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

TBGENIUS£18.034.4★229 rev

Newest

by launch date

AMAMHAHAVA Adult Shark Onesie Costume Halloween Animal Cosplay Pyjamas Novelty Nightwear for Women and Men

AMAMHAHAVA£20.2036 rev

7mo ago

FUNFOCUS Inflatable Shark Costume Adult - Full Body Air Shark Costume Men Women Funny Fancy Dress Costume for Halloween Christmas Carnival Party (Inflatable Shark Flamingos Costume Adult)

FUNFOCUS£20.287 rev

7mo ago

Inflatable Shark Costume Adult Inflatable Costumes Adult Size Full Body Blow up Costumes for Adults Women Men Inflatables Fancy Funny Suit for Halloween Christmas Carnival Party

FUNFOCUS£17.8721 rev

9mo ago

COOKY.D Kids Shark Costume Romper Hooded Carnival Pyjamas Outfit 2-3 Years

COOKY.D£17.0119 rev

1y ago

Inflatable Shark Costume Adult Inflatable pink shark Costumes Adult Size Full Body Blow up Costumes for Adults Women Men Inflatables Fancy Funny Suit for Halloween Christmas Carnival Party

FUNFOCUS£17.4710 rev

1y ago

What buyers say about shark costume

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

What buyers love

Size-Overall27%

“Overall i would recommend as long as the sizing is correct for you as it came up abit small on my partner”

Value For Money18%

“Good value for money”

Warmth11%

“Cosy and warm”

Quality-Overall9%

“No complaints here”

Fun/Entertainment Experience9%

“Fun costume, easy to wear, fan works”

Soft Feel5%

“Very soft and comfortable to wear”

Comfort-Overall4%

“comfy”

Quick Drying3%

“Washes and drys quickly”

Gifting Purpose3%

“Christmas gift”

Ease Of Use1%

“Easy to wear”

What buyers complain about

Size-Overall33%

“Terrible fit”

Material Quality11%

“Very light material take care when putting on”

Inflation/Deflation11%

“wont inflate fully”

Quality-Overall6%

“Poorly made and poorly fitting”

Heating6%

“Does get quite hot inside”

Stitch/Finish/Polish4%

“Reason for the 3 stars is that the product came damaged with a small hole on the sole of the right foot along the seam”

Thin4%

“Only issue is it's a little thin”

Top return reasons

Size-Overall75%

Quality-Overall5%

Inflation/Deflation2%

Advertised Vs Actual Product2%

Stitch/Finish/Polish2%

Functionality-Overall2%

Material Quality1%

Comfort-Overall1%

Touch/Button Controls1%

Value For Money1%

Common questions

Is shark costume profitable to sell on Amazon United Kingdom?: The niche generates £77K/yr across 26 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -29.5%. Flapen's verdict: Skip it (42/100).
How competitive is the shark costume niche?: 18 brands and 23 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 69% of demand.
What do buyers complain about in shark costume?: Top complaints mined from reviews: Size-Overall, Material Quality, Inflation/Deflation. The return rate is 4.5%.
When does demand for shark costume peak?: Demand peaks in Mar–Oct–Nov; the busiest month runs 10.3× the quietest.
What does it cost to enter the shark costume niche?: Listings span £9.04–£27.89; the average listing price is £18.82 (sweet spot $15–$100). The average incumbent carries 221 reviews — the moat a new listing must climb.