Hybrid sunfish
Lepomis macrochirus × Lepomis cyanellus
Water parameters
Minimum tank: 400 L per individual at harvest size.
Feed and growth
- Feed protein
- 36% target
- Daily feed (warm)
- 3.00% of body weight
- Daily feed (cool)
- 0.80% of body weight
- Max density
- 30 g per litre
A 450 g adult eats about 13.5 g of feed per day at optimum. 10 fish at adult size: ~135 g daily.
Origin and habitat
A cross between two sunfish species, most commonly green sunfish (Lepomis cyanellus) x bluegill (Lepomis macrochirus). The hybrid has been produced since the 1960s for pond stocking and aquaculture because it grows faster than either parent species and the sex ratio is heavily skewed toward males (90-95% male), which grow larger and don't divert energy to reproduction. Hybrid sunfish are stocky, deep-bodied panfish reaching 200–400 g in culture. The flesh is white, firm, and mild, comparable to bluegill. They're popular for recreational pond stocking in the US because they provide fast-growing, easily caught fish for family fishing ponds.
Climate and outdoor ponds
- Climate
- temperate (handles seasonal swings)
- USDA zones
- 4–10 (winter low around -34°C or warmer)
- Heating needed
- no
- Cooling needed
- no
Care notes
A practical aquaponics alternative to bluegill with faster growth and built-in population control. Hybrid sunfish reach harvest size (200–400 g) in 12-15 months, about 30% faster than pure bluegill under the same conditions. FCR is 1.5-2.2 on commercial sunfish or catfish pellet (32-38% protein). The predominantly male sex ratio (90-95% male) means minimal reproductive interference with growth, and the few females in a cohort rarely produce viable offspring because hybrid fertility is reduced. This effectively eliminates the overpopulation problem that plagues tilapia and some other livebearer-type systems, without requiring hormonal sex reversal or manual sexing. Temperature range: 5–32°C, optimal at 24–28°C. Dissolved oxygen above 4 mg/L; ammonia below 1 mg/L. Stocking density: 10-20 g/L. Hybrid sunfish are legal in most US states and fingerlings are widely available from fish hatcheries, farm stores, and pond stocking suppliers across the Midwest and Southeast. They're hardy, disease-resistant, and tolerant of handling. The main limitation is harvest size: even the largest hybrids produce small individual fillets compared to tilapia, catfish, or bass. For personal consumption in a family-scale aquaponics system this is acceptable. For commercial sale, the yield per fish is too small to be competitive with larger species. Best suited for home aquaponics operators in temperate US climates who want a legal, easy-to-manage, self-limiting fish with excellent flesh quality and broad temperature tolerance.