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Estuarine crocodiles - the world's largest crocodilian
Close-up view
Photo: Fisheries & Wildlife Texas A & M University
Estuarine crocodiles (Crocodylus porosus) occur along the coast in the Great Barrier Reef Marine Park, especially in the Far Northern Section, however, they are generally considered as temporary migrants from coastal river systems.

As their name suggests, these crocodiles are often associated with estuaries, however, they are tolerant of an extremely wide range of fresh water and marine habitats and may be found on rivers a significant distance inland from the coast.

Estuarine crocodiles have also been recorded swimming strongly in the open ocean more than 1000 km from the nearest land.

Extreme care should always be taken in areas known to be frequented by crocodiles. Warning signs should be heeded.