Estuary Cod

Habitat Distribution

• Native to Australia — found from Carnarvon (WA) northward around the tropical coast and south to northern NSW, with Queensland holding the densest populations.
• Juveniles live in estuaries, mangrove creeks, and silty or brackish shallows; adults shift to inshore reefs, rocky rubble ground, and deeper water down to around 100 m.
• WA range runs from Shark Bay north through the Kimberley, where creek and inshore reef populations are largest in that state.
• Turbid coastal reefs and brackish tidal reaches are the core habitat — they're not a clear-water reef fish.

Key Locations

• Kimberley coast, WA — creek systems and inshore reefs hold the largest WA populations, with fish running bigger than in southern parts of the range.
• Queensland's Gulf of Carpentaria river systems and tidal creeks — consistent bycatch alongside barramundi and mangrove jack throughout the tropical north.
• Northern Territory estuaries and tidal rivers — same mangrove creek habitat as the NT barramundi fishery puts anglers right on top of estuary cod.
• Northern NSW to southeast Queensland — the southern edge of the range; fish are less common but present in turbid coastal estuaries.

Specific Spots

• Undercut mangrove banks and submerged root systems in tidal creeks — cod sit tight to structure and wait for prey to pass within range.
• Deep holes in estuaries and creek bends where current slows; larger fish hold on the bottom of these pools, especially on the downstream edge of the scour.
• Inshore reef rubble, rocky outcrops, and bommies — adults use the same lie-and-lunge approach on the reef that juveniles use in the mangroves.
• Any hard structure near a depth change: bridge pylons, rock walls, submerged timber — the fish wants something solid at its back.