Is koi fish profitable to sell on Amazon United States?

The niche generates $239K/yr across 16 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +57.5%. Flapen's verdict: Worth a look (53/100).

How competitive is the koi fish niche?

6 brands and 6 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 98% of demand.

What do buyers complain about in koi fish?

Top complaints mined from reviews: Size-Overall, Durability, Color. The return rate is 0.0%.

When does demand for koi fish peak?

Demand peaks in Apr–May–Jun–Jul; the busiest month runs 2.7× the quietest.

What does it cost to enter the koi fish niche?

Listings span $46.21–$186.28; the average listing price is $108.10 (sweet spot $15–$100). The average incumbent carries 383 reviews — the moat a new listing must climb.

koi fish

Worth a look

Shows low returns (0.0%), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 6% kills the launch gate

Quality gap

Incredible3.9★

avg incumbent rating — lower means beatable quality

Review moat

Great383.25

avg incumbent reviews — the moat a new listing must climb

Growth

Good+57.5%

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

Avg price

Good$108.10

avg listing price — sweet spot $15–$100

Market size

Okay$239K

$239K/yr · 276K searches

Price range

Okay$46.21–$186.28

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

Competition

Okay66%

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

Conversion

Bad0.8%

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

Brand share

Bad98%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, koi fish is a $239K/yr Amazon United States market (276K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 53/100.

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

koi fish market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: $216K–$270K; units × avg price
Launch success: —; 0 of 2 new (360d)
Conversion rate: 0.8%
Avg BSR: #218
Page quality: 0%
Prime: 0%
Sponsored: 50%
Out of stock: 18.3%
Avg brand age: 44 months
Avg seller age: 166 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

6 falling

Sellers

Top-5 brand share

98%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

Seam Oasis35%
Toledo Goldfish32%
Generic18%
Swimming Creatures11%
generic2%
THAT FISH SHOP2%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +57.5% search growth over the last 90 days.

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×

Open Trend

Top koi fish search terms

koi fish128K/yr +52.4%0.5% conv.
koi fish live31K/yr +66.2%0.6% conv.
live koi fish31K/yr +18.1%0.5% conv.
koi fish for sale17K/yr +130.9%0.3% conv.
live koi fish for sale cheap14K/yr +83.4%0.3% conv.
live koi fish for sale11K/yr +48.8%0.3% conv.
live koi fish for pond7K/yr +128.1%0.5% conv.
butterfly koi fish live9K/yr +67.5%0.8% conv.
live koi8K/yr +69.0%0.5% conv.
coy fish5K/yr +46.0%0.5% conv.

All search terms

Top koi fish 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 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Seam Oasis Premium Live Fish Combo Pack of 9 (3 Dambo Red Rose 3 Goldfish Koi Standard Fin 3 Full Gold 24K Guppies) Vibrant Colors Hardy & Active

Seam Oasis$55.173.9★663 rev

Toledo Goldfish Standard Fin Koi Variety of Colors and Patterns - Beautiful Live Fish Perfect for Ponds Tanks and Aquariums - 3-4 Inches 20 Count

Toledo Goldfish$170.154.4★1,207 rev

Toledo Goldfish Standard Fin Koi Variety of Colors and Patterns - Beautiful Live Fish Perfect for Ponds Tanks and Aquariums - 3-4 Inches 5 Count

Toledo Goldfish$126.774.4★1,207 rev

Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)

Generic$86.623.8★4 rev

Standard Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 10)

Generic$103.843.8★8 rev

Newest

by launch date

Swimming Creatures 2 PCS Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 2)

Swimming Creatures$46.214 rev

2mo ago

Seam Oasis Premium Live Fish Combo Pack of 9 (3 Dambo Red Rose 3 Goldfish Koi Standard Fin 3 Full Gold 24K Guppies) Vibrant Colors Hardy & Active

Seam Oasis$55.17663 rev

6mo ago

Swimming Creatures Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (5)

Swimming Creatures$105.406 rev

1y ago

Swimming Creatures Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (6)

Swimming Creatures$117.4726 rev

1y ago

Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)

Generic$86.624 rev

1y ago

What buyers say about koi fish

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

What buyers love

Color38%

“beautiful all colors I will order this company again”

Quality-Overall25%

“Good Quality”

Freshness17%

“They seem like they arrived healthy”

Shape/Style4%

“Nice body shape absolutely no deformities”

Weather Proof4%

“We had lots of rain”

Locally Manufactured4%

“and the nice thing about these fish they where raised in the good old U. S.A”

Size-Overall4%

“good size as well”

Safety Standards4%

“all my koi arrived safe”

What buyers complain about

Size-Overall25%

“These fish were so small”

Durability25%

“All of them died within days”

Color13%

“we know the colors may vary”

Contamination13%

“fish had disease”

Quality-Overall13%

“Not good quality”

Value For Money6%

“definitely not worth it”

Water Resistance6%

“This time there was hardly any water in the fish”

Top return reasons

Size-Overall44%

Durability22%

Advertised Vs Actual Product11%

Contamination11%

Stale/Rotten/Spoiled11%

Common questions

Is koi fish profitable to sell on Amazon United States?: The niche generates $239K/yr across 16 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +57.5%. Flapen's verdict: Worth a look (53/100).
How competitive is the koi fish niche?: 6 brands and 6 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 98% of demand.
What do buyers complain about in koi fish?: Top complaints mined from reviews: Size-Overall, Durability, Color. The return rate is 0.0%.
When does demand for koi fish peak?: Demand peaks in Apr–May–Jun–Jul; the busiest month runs 2.7× the quietest.
What does it cost to enter the koi fish niche?: Listings span $46.21–$186.28; the average listing price is $108.10 (sweet spot $15–$100). The average incumbent carries 383 reviews — the moat a new listing must climb.

koi fish

koi fish market data

Competition & brand share

Demand & seasonality

Top koi fish search terms

Top koi fish products on Amazon

Top sellers

Newest

Trending

What buyers say about koi fish

What buyers love

What buyers complain about

Top return reasons

Common questions

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