Golden perch
Macquaria ambigua
Also known asYellowbelly · Callop
Water parameters
Minimum tank: 500 L per individual at harvest size.
Feed and growth
- Feed protein
- 42% target
- Daily feed (warm)
- 1.20% of body weight
- Daily feed (cool)
- 0.50% of body weight
- Max density
- 35 g per litre
A 1500 g adult eats about 18.0 g of feed per day at optimum. 10 fish at adult size: ~180 g daily.
Legality
Rules vary by jurisdiction and change over time. Verify with your local fisheries or wildlife authority before stocking.
| Jurisdiction | Status | Notes |
|---|---|---|
| New South Wales | legal | Native species; aquaculture from licensed hatchery fingerlings does not require special permit verified 2026-05-13 |
| Victoria | permit required | Permit required outside native range verified 2026-05-13 |
| Western Australia | prohibited | verified 2026-05-13 |
Unlisted jurisdictions default to "check local regulations".
Origin and habitat
Native to the Murray-Darling River basin and other inland drainages across eastern Australia. The species (Macquaria ambigua) is one of Australia's most important native freshwater sport and food fish, commonly called yellowbelly or callop depending on the region. Found in turbid, slow-moving rivers, billabongs, and lakes. Adults reach 5–8 kg in the wild, though culture and aquaponics harvest size is typically 400–800 g. The flesh is white, firm, and well-flavored, popular in the Australian domestic market. Golden perch are warm-water fish that tolerate a wider temperature range than most Australian native species, including both summer heat and winter cold that would kill barramundi.
Climate and outdoor ponds
- Climate
- subtropical (tolerates mild cooling)
- USDA zones
- 8–13 (winter low around -12°C or warmer)
- Heating needed
- yes
- Cooling needed
- no
Care notes
A warm-water to temperate aquaponics species well-suited to Australian conditions, particularly in the Murray-Darling basin and inland regions where temperature extremes are significant. Optimal growth temperature is 23–28°C, but the species tolerates 4–35°C and survives Australian winters without supplemental heating in most mainland locations (excluding alpine areas). This broad temperature flexibility is a major advantage over barramundi, which needs 26–30°C year-round and dies below 15°C. Growth: 400–800 g in 12-18 months on commercial pellet (40-45% protein). FCR is approximately 1.5-2.0. Stocking density: 15-25 g/L. Golden perch accept pelleted feed readily when trained as small fingerlings (under 5 cm) but are very reluctant to convert if initially raised on live food. Source feed-trained fingerlings from established Australian hatcheries and verify that the fish are pellet-weaned before purchase. Water quality requirements are moderate and forgiving: DO above 4 mg/L, ammonia below 1 mg/L, pH 6.5-8.5. The species naturally inhabits turbid water and is less stressed by suspended particulates than trout or perch. Fingerlings are widely available from government fish hatcheries and private breeders across eastern Australia, with supply peaking in spring and summer. Legal to culture in all states within its native range without special permits, which simplifies regulatory compliance compared to non-native species like tilapia. Golden perch fill the same practical niche in Australian aquaponics that bluegill fills in American systems: a legal, native species with excellent eating qualities, broad temperature tolerance, and good availability.