Yellow perch

Quick facts

Adult size

25 cm, 300 g typical harvest weight

Days to harvest

365 to 730 days from fingerling

Lifespan (max)

up to 11 years

Diet

carnivore

Temperature class

cool-water

Difficulty

intermediate

Water parameters

Temperature range

4–25°C (optimum 22°C)

pH

6.5 to 8.5

Hardness

5 to 25 dGH

Minimum tank

200 L per individual at harvest size

Feed and growth

Feed protein

40% target

Daily feed (warm water)

1.40% of body weight per day

Daily feed (cool water)

0.70% of body weight per day

Max stocking density

45 g per litre of system water

A 300g adult eats about 4.2 g of feed per day at optimum temperature. For a roster of 10 fish at adult size, that's around 42 g of feed daily.

Legality

Aquaculture and possession rules vary by jurisdiction and change over time. This table reflects regulations as of the verified date on each row. Verify with your local fisheries or wildlife authority before stocking.

Jurisdictions not listed here default to "check local regulations". A non-listing is not a green light; rules in your specific county or municipality may apply.

Habitat and origin

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 classification

temperate (handles seasonal swings)

Outdoor pond zones (USDA)

3 to 9 (winter low around -40°C or warmer)

Heating in a temperate climate

Not required (handles seasonal cool periods)

Cooling in a temperate climate

Required if your summer water temperatures exceed the upper tolerance

Zone bounds reflect year-round outdoor pond viability with no active heating. Anywhere outside the bounded zone, the species can still be kept in an indoor heated tank or a seasonally-managed system. Verify your specific microclimate, as a sheltered yard zone can run a half-zone warmer than the regional rating.

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.

Further reading

• Aquaponics water chemistry: balancing pH for fish and plants
• Fish for aquaponics: tilapia vs everything else