Bloomfield River Cod

Interesting Info

• The Bloomfield River Cod is one of the rarest and most geographically restricted cod species in Australia, found only in the Bloomfield River system in far north Queensland, just south of Cooktown.
• Their body is olive-green to dark brown with irregular blotches and marbling that provide camouflage among rocks and submerged timber.
• They are the most northerly of all the Australian freshwater cod, adapted to warmer tropical rivers compared to the cooler-water cod species of southeastern Australia.
• Bloomfield River Cod favour shaded rainforest streams, living in deep rocky pools, snags, and undercut banks. The Bloomfield River is only about 30 km long, making their entire natural distribution one of the most restricted of any Australian fish.
• Their diet is carnivorous — eating fish, crustaceans, insects, and frogs, ambushing prey from cover.
• Breeding is thought to occur in the early wet season (November–January), when water levels rise. Like other cod, they are nest spawners, with males guarding eggs in logs or rocky crevices.
• Juveniles likely use shallower margins and vegetated backwaters before moving into deeper pools as they grow.
• Their extremely limited range makes them highly vulnerable to threats, including habitat disturbance, water pollution, fishing pressure, and climate change.
• Lifespan is not well studied, but based on other Maccullochella species, they likely live 10–15 years or more.