---
title: "Fish Hydrolysate — $100K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/fish-hydrolysate"
last_updated: "2026-08-10T18:21:37.393Z"
locale: en
meta:
description: "Niche score 58/100 · $100K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 58/100 · $100K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fish Hydrolysate — $100K/yr Amazon US Niche (2026) - Flapen"
---
# **fish hydrolysate**
**Worth a look**
Shows low returns (0.3%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 25Growth 95Conversion 82Competition 42Returns 99Price range 86Avg price 95Brand share 24Review moat 43Quality gap 23
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Growth**
**Incredible****+112.6%**
90-day search growth — must beat 0% to launch
**Avg price**
**Incredible****$26.01**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.15–$52.23**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.6%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****2,213.73**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Bad****$100K**
$100K/yr · 44K searches
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United States niche tracking, fish hydrolysate is a $100K/yr Amazon United States market (44K searches/yr). The top 5 brands hold 91% of demand. Verdict: Worth a look — 58/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fish hydrolysate market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$78K–$104K**
- units × avg price
- **Conversion rate**
- **8.6%**
- **Avg BSR**
- **#1,014**
- **Page quality**
- **0%**
- **Prime**
- **91%**
- **Sponsored**
- **91%**
- **Out of stock**
- **12.2%**
- **Avg brand age**
- **99 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▲rising
**Sellers**
**85**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**60%**
Top 20: 98%
**Open market**
**7%**
- Neptune's Harvest39% - GS Plant Foods37% - Fish Brew6% - Alaska5% - Indian River Organics3% - The Grow Co3% - Open — no brand owns it (4 brands, 7%)
## **Demand**
Weekly Amazon search volume, last 15 weeks — +112.6% search growth over the last 90 days.
2K1KSpike '26Apr '26Apr '26May '26May '26May '26Jun '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/fish-hydrolysate/trend)
## **Top fish hydrolysate search terms**
- **fish hydrolysate**11K/yr+138.0%4.9% conv. - **fish and kelp liquid fertilizer**10K/yr+60.4%9.1% conv. - **neptunes harvest fish fertilizer**7K/yr+100.2%11.5% conv. - **fish hydrolysate fertilizer**5K/yr+148.7%4.9% conv. - **liquid fish hydrolysate**2K/yr>1,000%6.0% conv. - **neptune fish fertilizer**3K/yr+61.9%11.9% conv. - **fish and kelp fertilizer**4K/yr+42.2%6.8% conv. - **fish kelp fertilizer**2K/yr+68.5%8.8% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/fish-hydrolysate/search-terms)
## **Top fish hydrolysate 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%5%$5K10%$10K15%$15K20%$20K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) Organic Material Review Institute Listed Natural Plant Food for Home Gardens Lawns and Vegetables**GS Plant Foods**$40.30**4.6★2,772 rev](https://www.amazon.com/dp/B00BBLMXVQ) [2**Neptunes Harvest Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables Flowers Fruit Trees Grass - Indoor and Outdoor Plant Food (Quart)**Neptune's Harvest**$22.72**4.7★3,110 rev](https://www.amazon.com/dp/B0012Q2TFA) [3**GS Plant Foods Liquid Fish Fertilizer - Organic Material Review Institute Listed (1 Gallon) Natural Hydrolyzed Fish Fertilizer for Gardens Lawns & Container Growing**GS Plant Foods**$40.54**4.7★1,921 rev](https://www.amazon.com/dp/B00LUT5E74) [4**Neptunes Harvest Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables Flowers Fruit Trees Grass - Indoor and Outdoor Plant Food (Gallon)**Neptune's Harvest**$44.80**4.7★3,110 rev](https://www.amazon.com/dp/B000IJCZC4) [5**GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Quart) Organic Material Review Institute Listed Natural Plant Food for Home Gardens and Vegetables**GS Plant Foods**$20.62**4.6★2,772 rev](https://www.amazon.com/dp/B00A2A2GT6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food (1 Gallon)**Fish Brew**$39.83**4 rev7mo ago](https://www.amazon.com/dp/B0G4NVT26C) [**Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food Available in 32oz (32 oz)**Fish Brew**$15.00**4 rev8mo ago](https://www.amazon.com/dp/B0G228DBCW) [**Alaska Fish Fertilizer OMRI Listed 5-1-1**Alaska**$26.61**886 rev1y ago](https://www.amazon.com/dp/B0DQ2LNX35) [**Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz**TPS NUTRIENTS**$10.15**53 rev1y ago](https://www.amazon.com/dp/B0DQRM621V) [**Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz**TPS NUTRIENTS**$11.89**309 rev1y ago](https://www.amazon.com/dp/B0DQR1X69R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food (1 Gallon)**Fish Brew**$39.83**4.7★**▲ 111%**](https://www.amazon.com/dp/B0G4NVT26C) [**Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz**TPS NUTRIENTS**$10.15**4.3★**▲ 92%**](https://www.amazon.com/dp/B0DQRM621V) [**Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food Available in 32oz (32 oz)**Fish Brew**$15.00**4.7★**▲ 84%**](https://www.amazon.com/dp/B0G228DBCW) [**Organic Wild Fish Fertilizer and Plant Supplement Great for Roots and Soil Made from Sustainable Salmon by Bloom City Gallon (128 oz)**Bloom City**$37.06**4.6★**▲ 30%**](https://www.amazon.com/dp/B077NJYSBS) [**Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz**TPS NUTRIENTS**$11.89**4.6★**▲ 24%**](https://www.amazon.com/dp/B0DQR1X69R)
**~~View all trending →~~**
## **What buyers say about fish hydrolysate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Plant Growth**53%
*“This product really helped my plants grow”*
**Quality-Overall**9%
*“Great and consistent product”*
**Smell**9%
*“no bad smell”*
**Ease Of Use**5%
*“Easy to use”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Value For Money**4%
*“It is worth it”*
**Strength**2%
*“Highly effective”*
**Instructions/User Manual/Troubleshooting**1%
*“Easy instructions”*
**Color**1%
*“And green”*
**Ease Of Cleaning**1%
*“Great product, easier to use and clean up”*
### **What buyers complain about **
**Smell**42%
*“Horrible fishy smell”*
**Leak-Proof**10%
*“Arrived leaking”*
**Hard Feel**4%
*“Stinky”*
**Contamination**3%
*“Can burn plants if not diluted enough, be cautious, more is not better”*
**Plant Growth**2%
*“Didnt provide any benefit to my plants”*
**Value For Money**2%
*“Bad value”*
**Advertised Vs Actual Product**1%
*“Not the same”*
**Quality-Overall**1%
*“Rating not based on effectiveness of product”*
**Moist/Dry**1%
*“it seems as though its watered down in a way”*
**Product Condition**1%
*“Looked like part of it has been used”*
### **Top return reasons **
**Leak-Proof**48%
**Smell**16%
**Value For Money**8%
**Size-Overall**6%
**Advertised Vs Actual Product**5%
**Functionality-Overall**3%
**Product Condition**2%
**Defective Material/Parts**2%
**Contamination**2%
**Plant Growth**1%
## **Common questions**
- **Is fish hydrolysate profitable to sell on Amazon United States?**
- The niche generates $100K/yr across 22 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +112.6%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the fish hydrolysate niche?**
- 10 brands and 85 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in fish hydrolysate?**
- Top complaints mined from reviews: Smell, Leak-Proof, Hard Feel. The return rate is 0.3%.
- **What does it cost to enter the fish hydrolysate niche?**
- Listings span $10.15–$52.23; the average listing price is $26.01 (sweet spot $15–$100). The average incumbent carries 2,214 reviews — the moat a new listing must climb.
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