Yellow perch
Perca flavescens
Water parameters
Minimum tank: 200 L per individual at harvest size.
Feed and growth
- Feed protein
- 40% target
- Daily feed (warm)
- 1.40% of body weight
- Daily feed (cool)
- 0.70% of body weight
- Max density
- 45 g per litre
A 300 g adult eats about 4.2 g of feed per day at optimum. 10 fish at adult size: ~42 g daily.
Legality
Rules vary by jurisdiction and change over time. Verify with your local fisheries or wildlife authority before stocking.
| Jurisdiction | Status | Notes |
|---|---|---|
| California | permit required | verified 2026-05-13 |
| Michigan | permit required | Michigan DNR aquaculture registration required verified 2026-05-13 |
| European Union (bloc) | check local regulations | Closely related to European perch; check local invasive species rules verified 2026-05-13 |
Unlisted jurisdictions default to "check local regulations".
Origin and habitat
Native to lakes, rivers, and reservoirs across eastern and central North America, from the Great Lakes south through the Appalachians and west to the Great Plains. A cool-water species that thrives at 18–24°C. Yellow perch (Perca flavescens) is a premium food fish with firm, mild, delicately flavored white flesh that commands high market prices, particularly in the Great Lakes region and northeastern United States where it's a traditional table fish. Wild populations support significant commercial and sport fisheries (Lake Erie perch is the classic example). The species adapts to culture conditions but grows relatively slowly compared to warm-water species. Selective breeding programs at universities (mainly in the Upper Midwest) have produced improved strains with faster growth and better feed conversion.
Climate and outdoor ponds
- Climate
- temperate (handles seasonal swings)
- USDA zones
- 3–9 (winter low around -40°C or warmer)
- Heating needed
- no
- Cooling needed
- yes, if summer water exceeds upper tolerance
Care notes
A premium-value aquaponics fish for cool-water systems operating at 16–22°C. Growth is slow: 15-24 months to reach a modest 150–250 g harvest weight, which is small by aquaculture standards. The individual fish are small but the market price is excellent ($12-20/kg at retail in the Upper Midwest and Northeast), making them economically viable despite the slow growth if you have a local market. FCR on perch pellet (38-42% protein) is 1.8-2.5. Stocking density should stay moderate (10-15 g/L) because perch are less tolerant of crowding than tilapia or catfish and become aggressive at high densities. Water quality must be tighter: keep ammonia below 0.5 mg/L, dissolved oxygen above 5 mg/L, and pH at 7.0-8.0. Perch are legal to culture in most US states without special permits and fingerlings are available from several Great Lakes region hatcheries. The main challenge is sourcing feed-trained fingerlings that accept pellet feed; perch raised on live food are difficult to wean. Cannibalism is a persistent problem when size classes are mixed: grade regularly and separate fish by size to prevent losses. Perch is a strong candidate for aquaponics in northern climates where the cool water that the fish needs matches the ambient temperature, avoiding heating costs entirely.