fish hydrolysate
Worth a lookShows low returns (0.3%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Growth
Incredible+112.6%90-day search growth — must beat 0% to launch
Avg price
Incredible$26.01avg listing price — sweet spot $15–$100
Price range
Great$10.15–$52.23cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great8.6%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,213.73avg incumbent reviews — the moat a new listing must climb
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Market size
Bad$100K$100K/yr · 44K searches
Brand share
Bad91%top-5 brand share — brand-locked demand
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
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
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.Top fish hydrolysate search terms
- fish hydrolysate11K/yr
- fish and kelp liquid fertilizer10K/yr
- neptunes harvest fish fertilizer7K/yr
- fish hydrolysate fertilizer5K/yr
- liquid fish hydrolysate2K/yr
- neptune fish fertilizer3K/yr
- fish and kelp fertilizer4K/yr
- fish kelp fertilizer2K/yr
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.
All 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$40.304.6★2,772 rev
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$22.724.7★3,110 rev
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$40.544.7★1,921 rev
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$44.804.7★3,110 rev
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$20.624.6★2,772 rev
Newest
by launch date
Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food (1 Gallon)
Fish Brew$39.834 rev
Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food Available in 32oz (32 oz)
Fish Brew$15.004 rev
Alaska Fish Fertilizer OMRI Listed 5-1-1
Alaska$26.61886 rev
Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz
TPS NUTRIENTS$10.1553 rev
Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz
TPS NUTRIENTS$11.89309 rev
Trending
90-day click momentumFish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food (1 Gallon)
Fish Brew$39.834.7★
Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz
TPS NUTRIENTS$10.154.3★
Fish Brew Organic Fish Hydrolysate Fertilizer 2.0-3.0-0.24 NPK Liquid Plant Food Available in 32oz (32 oz)
Fish Brew$15.004.7★
Organic Wild Fish Fertilizer and Plant Supplement Great for Roots and Soil Made from Sustainable Salmon by Bloom City Gallon (128 oz)
Bloom City$37.064.6★
Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz
TPS NUTRIENTS$11.894.6★
What buyers say about fish hydrolysate
What buyers praise and complain about, mined from review topics.What buyers love
“This product really helped my plants grow”
“Great and consistent product”
“no bad smell”
“Easy to use”
“As advertised”
“It is worth it”
“Highly effective”
“Easy instructions”
“And green”
“Great product, easier to use and clean up”
What buyers complain about
“Horrible fishy smell”
“Arrived leaking”
“Stinky”
“Can burn plants if not diluted enough, be cautious, more is not better”
“Didnt provide any benefit to my plants”
“Bad value”
“Not the same”
“Rating not based on effectiveness of product”
“it seems as though its watered down in a way”
“Looked like part of it has been used”
Top return reasons
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.