iron fish
Skip itA concentrated shelf (top 5 take 90% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.6%return rate — above 5% kills the launch gate
Avg price
Great£15.58avg listing price — sweet spot $15–$100
Price range
Good£4.87–£41.56cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good955.75avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Good4.7%search→purchase rate — share of searches ending in a sale
Brand share
Bad93%top-5 brand share — brand-locked demand
Market size
Bad£67K£67K/yr · 91K searches
Growth
Bad-30.1%90-day search growth — must beat 0% to launch
Competition
Bad90%top-5 click share — a locked-up shelf
According to Flapen's Amazon United Kingdom niche tracking, iron fish is a £67K/yr Amazon United Kingdom market (91K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Oct. Verdict: Skip it — 39/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
iron fish market data
- Units sold / yr
- 3K–4K
- avg 250–500/product
- Revenue / yr
- £47K–£62K
- units × avg price
- Conversion rate
- 4.7%
- Avg BSR
- #373
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 12.5%
- Avg brand age
- 39 months
- Avg seller age
- 199 days
Competition & brand share
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 rising
Sellers
9
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
90%
Top 20: 100%
Open market
3%
- Lucky Iron Fish52%
- Cumnvulnt17%
- YANAJIAJIA12%
- louuuou7%
- Jekasy6%
- RUILILANG4%
- Open — no brand owns it (1 brand, 3%)
Demand & seasonality
Weekly Amazon search volume, last 84 weeks — -30.1% search growth over the last 90 days.Peak months: Oct · busiest ÷ quietest = 1.6×
Top iron fish search terms
- iron fish55K/yr
- iron fish for iron deficiency18K/yr
- lucky iron fish11K/yr
- iron fish for cooking6K/yr
Top iron 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.
All 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Lucky Iron Fish | The Original Iron Fish | Iron Supplement Alternative | 5-Year Reusable Supply | Cooking Tool to Reduce Deficiency | No Side Effects
Lucky Iron Fish£41.404.3★3,783 rev
Iron Fish for Deficiency Cast Iron Figurine Reduce the Risk of Anemia Perfect for Vegans Athletes Pregnant Women & Kids Gift Loved Ones
Cumnvulnt£7.304.1★23 rev
YANAJIAJIA 2 Pack Cast Iron Fish for Iron Deficiency Cooking Tool Reusable Fish Shaped Ingot Natural Mineral Helper for Soup Tea and Curry Water Enrichment
YANAJIAJIA£4.873.8★6 rev
2 Pcs Iron Fish for Cooking Iron Fish for Iron Deficiency
louuuou£6.994.5★16 rev
Jekasy 3Pcs Iron Fish with Hooks & Dry Cloth Natural Iron Deficiency Supplement for Cooking Reusable Anemia Relief for Vegans Athletes Pregnant Women 5+ Years Use and Health Gift
Jekasy£10.734.3★30 rev
Newest
by launch dateYANAJIAJIA 2 Pack Cast Iron Fish for Iron Deficiency Cooking Tool Reusable Fish Shaped Ingot Natural Mineral Helper for Soup Tea and Curry Water Enrichment
YANAJIAJIA£4.876 rev
2-Pack Reusable Iron Fish for Cooking Natural Iron Fish for Iron Deficiency Safe Iron Supplement Tool for Vegans Pregnant Women & Kids
Wnzdp£5.941 rev
RUILILANG 2 Pcs Iron Fish for Cooking Cast Iron Fish Figurine Reduce The Risk of Deficiency Suitable Home and Kitchen Decoration Safely Gift Loved Ones
RUILILANG£5.864 rev
Jekasy 3Pcs Iron Fish with Hooks & Dry Cloth Natural Iron Deficiency Supplement for Cooking Reusable Anemia Relief for Vegans Athletes Pregnant Women 5+ Years Use and Health Gift
Jekasy£10.7330 rev
2 Pcs Iron Fish for Cooking Iron Fish for Iron Deficiency
louuuou£6.9916 rev
Trending
90-day click momentumYANAJIAJIA 2 Pack Cast Iron Fish for Iron Deficiency Cooking Tool Reusable Fish Shaped Ingot Natural Mineral Helper for Soup Tea and Curry Water Enrichment
YANAJIAJIA£4.873.8★
Jekasy 3Pcs Iron Fish with Hooks & Dry Cloth Natural Iron Deficiency Supplement for Cooking Reusable Anemia Relief for Vegans Athletes Pregnant Women 5+ Years Use and Health Gift
Jekasy£10.734.3★
2-Pack Reusable Iron Fish for Cooking Natural Iron Fish for Iron Deficiency Safe Iron Supplement Tool for Vegans Pregnant Women & Kids
Wnzdp£5.945.0★
RUILILANG 2 Pcs Iron Fish for Cooking Cast Iron Fish Figurine Reduce The Risk of Deficiency Suitable Home and Kitchen Decoration Safely Gift Loved Ones
RUILILANG£5.864.8★
The Original Lucky Iron Leaf . an Iron Supplement Alternative to Reduce Deficiency. NO Side Effects. Use Once Daily - 5 Year Supply Included.
Lucky Iron Fish£41.564.3★
What buyers say about iron fish
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“worth it”
“A great cost effective way to get iron”
“Easy to clean”
“No complaints”
“the most noticeable thing is how smooth the finish feels”
“Intro: A visually charming”
“durable”
“dried thoroughly though to avoid rust”
“Solid little set”
What buyers complain about
“Rusts easily”
“I really couldnt taste anything different after using the bird, as I feared there may be a metallic taste”
“i disagree that its 'effortless'”
“one side has taken on really bizarre colours. see photo”
“Quite hard to clean”
“They are very weighty”
“Hard to measure the effect straight away”
“One thing I noticed is they can stain your fingers if you touch them directly”
“I don't get on well with supplements”
“I don't get on well with supplements”
Top return reasons
Common questions
- Is iron fish profitable to sell on Amazon United Kingdom?
- The niche generates £67K/yr across 8 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -30.1%. Flapen's verdict: Skip it (39/100).
- How competitive is the iron fish niche?
- 7 brands and 9 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in iron fish?
- Top complaints mined from reviews: Rusts/Corrodes, Taste-Overall, Ease Of Use. The return rate is 0.6%.
- When does demand for iron fish peak?
- Demand peaks in Oct; the busiest month runs 1.6× the quietest.
- What does it cost to enter the iron fish niche?
- Listings span £4.87–£41.56; the average listing price is £15.58 (sweet spot $15–$100). The average incumbent carries 956 reviews — the moat a new listing must climb.