---
title: "Koi Fish — $239K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/koi-fish"
last_updated: "2026-07-21T17:36:18.916Z"
locale: en
meta:
description: "Niche score 53/100 · $239K/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $239K/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Koi Fish — $239K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 45Growth 73Conversion 10Competition 32Returns 100Price range 38Avg price 72Brand share 5Review moat 81Quality gap 96
**Returns**
**Incredible****0.0%**
return rate — above 6% kills the launch gate
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Great****383.25**
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**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Bad****0.8%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Bad****98%**
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 ~~](https://flapen.com/research/methodology)
## **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**
**6**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**0%**
- 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.
15K10KSpike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/koi-fish/trend)
## **Top koi fish search terms**
- **koi fish**128K/yr+52.4%0.5% conv. - **koi fish live**31K/yr+66.2%0.6% conv. - **live koi fish**31K/yr+18.1%0.5% conv. - **koi fish for sale**17K/yr+130.9%0.3% conv. - **live koi fish for sale cheap**14K/yr+83.4%0.3% conv. - **live koi fish for sale**11K/yr+48.8%0.3% conv. - **live koi fish for pond**7K/yr+128.1%0.5% conv. - **butterfly koi fish live**9K/yr+67.5%0.8% conv. - **live koi**8K/yr+69.0%0.5% conv. - **coy fish**5K/yr+46.0%0.5% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/koi-fish/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.
0%10%$24K20%$48K30%$72K40%$95K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$55.17**3.9★663 rev](https://www.amazon.com/dp/B0GCV3M94J) [2**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**$170.15**4.4★1,207 rev](https://www.amazon.com/dp/B07G9KK74M) [3**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**$126.77**4.4★1,207 rev](https://www.amazon.com/dp/B07G9JSFRM) [4**Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)**Generic**$86.62**3.8★4 rev](https://www.amazon.com/dp/B0G1J9MCFC) [5**Standard Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 10)**Generic**$103.84**3.8★8 rev](https://www.amazon.com/dp/B0H1STN3JT)
**~~View all top sellers →~~**
### **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**$46.21**4 rev2mo ago](https://www.amazon.com/dp/B0H1TBF8W7) [**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**$55.17**663 rev6mo ago](https://www.amazon.com/dp/B0GCV3M94J) [**Swimming Creatures Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (5)**Swimming Creatures**$105.40**6 rev1y ago](https://www.amazon.com/dp/B0FGHDXJZQ) [**Swimming Creatures Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (6)**Swimming Creatures**$117.47**26 rev1y ago](https://www.amazon.com/dp/B0FFD6YXXN) [**Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)**Generic**$86.62**4 rev1y ago](https://www.amazon.com/dp/B0G1J9MCFC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Swimming Creatures 2 PCS Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 2)**Swimming Creatures**$46.21**5.0★**▲ 115%**](https://www.amazon.com/dp/B0H1TBF8W7) [**Standard Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 10)**Generic**$103.84**3.8★**▲ 115%**](https://www.amazon.com/dp/B0H1STN3JT) [**Standard Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)**Generic**$65.59**2.7★**▲ 115%**](https://www.amazon.com/dp/B0H1SHGKNK) [**Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (Pack of 5)**Generic**$86.62**3.8★**▲ 48%**](https://www.amazon.com/dp/B0G1J9MCFC) [**Swimming Creatures Premium Butterfly Fin Koi Assorted Colors & Patterns Live Pond & Aquarium Fish (Size Approx. 3-4) (5)**Swimming Creatures**$105.40**2.7★**▲ 45%**](https://www.amazon.com/dp/B0FGHDXJZQ)
**~~View all trending →~~**
## **What buyers say about koi fish**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Color**38%
*“beautiful all colors I will order this company again”*
**Quality-Overall**25%
*“Good Quality”*
**Freshness**17%
*“They seem like they arrived healthy”*
**Shape/Style**4%
*“Nice body shape absolutely no deformities”*
**Weather Proof**4%
*“We had lots of rain”*
**Locally Manufactured**4%
*“and the nice thing about these fish they where raised in the good old U. S.A”*
**Size-Overall**4%
*“good size as well”*
**Safety Standards**4%
*“all my koi arrived safe”*
### **What buyers complain about **
**Size-Overall**25%
*“These fish were so small”*
**Durability**25%
*“All of them died within days”*
**Color**13%
*“we know the colors may vary”*
**Contamination**13%
*“fish had disease”*
**Quality-Overall**13%
*“Not good quality”*
**Value For Money**6%
*“definitely not worth it”*
**Water Resistance**6%
*“This time there was hardly any water in the fish”*
### **Top return reasons **
**Size-Overall**44%
**Durability**22%
**Advertised Vs Actual Product**11%
**Contamination**11%
**Stale/Rotten/Spoiled**11%
## **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.
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