Trout Cod

Interesting Info

• The Trout Cod is an endangered freshwater fish native to the Murray–Darling Basin in southeastern Australia.
• Today, natural populations are confined to a few rivers in Victoria, New South Wales, and the ACT, with hatchery restocking programs helping to rebuild their range..
• They are closely related to the famous Murray Cod but are smaller, slimmer, and have different markings.
• Their body is bluish-grey to slate, covered in darker speckled patterns that look almost “trout-like” — which is where their name comes from.
• Historically, they were once widespread throughout the Murray–Darling Basin, but overfishing, habitat loss, and river regulation caused their numbers to crash in the 20th century.
• Young Trout Cod feed mainly on insects and crustaceans, while adults are ambush predators, eating yabbies, shrimp, and other fish.
• They prefer deep, fast-flowing rivers with snags and rocky bottoms, though stocked populations have adapted to lakes and reservoirs.
• Breeding happens in spring to early summer (October–December) when water warms to around 15–20°C. They are nest spawners — males guard and fan the eggs, which are laid on submerged logs, rocks, or other hard surfaces.
• Each female can lay 10,000–100,000 eggs, but survival rates depend heavily on water quality and habitat.
• Trout Cod are not legal to target recreationally, though anglers sometimes catch them accidentally when chasing Murray Cod. Strict regulations require immediate release.
• Trout Cod usually grow to 40–60 cm (16–24 in) and weigh around 1–3 kg (2–7 lb), though some individuals can reach 80 cm (31 in) and over 16 kg (35 lb).
• Lifespan is impressive — they can live for 20+ years if undisturbed, making them one of the longer-lived Australian freshwater species.