The saltwater crocodile (Crocodylus porosus) is the largest living reptile on Earth, with large males regularly exceeding 5 meters in length and 1,000 kilograms in weight. It inhabits estuaries, tidal rivers, mangrove swamps, and coastal lagoons across a range stretching from eastern India and Sri Lanka through Southeast Asia to northern Australia and the Solomon Islands, making it the most widely distributed crocodilian species in the world.
As an apex predator, Crocodylus porosus regulates prey populations including fish, crustaceans, mammals, and birds, and its role in nutrient cycling within coastal and riverine habitats is ecologically significant. Despite its Least Concern status on the IUCN Red List, the species faces ongoing pressure from habitat loss driven by mangrove clearance and coastal development, illegal hunting for its skin, and retaliatory killing in response to human-wildlife conflict, which is increasing as human settlements expand into crocodile territory across parts of Indonesia and Papua New Guinea.
Adult male saltwater crocodiles typically reach 4 to 5 meters in length, making them the largest living reptiles on Earth. Females are considerably smaller, usually under 3 meters. These size figures are consistent with measurements reported across range states from India to northern Australia.
The largest reliably measured saltwater crocodiles have exceeded 6 meters in length, though individuals above 5 meters are rare today. Historical hunting pressure across northern Australia, the Philippines, and the Sundarbans reduced the population of very large animals before protections were introduced in the 1970s.
Saltwater crocodiles live across a broad coastal range stretching from eastern India and Sri Lanka through Southeast Asia to northern Australia and the Solomon Islands. They inhabit river mouths, mangrove estuaries, tidal rivers, and occasionally open ocean, which accounts for their wide distribution across the Indo-Pacific.
Saltwater crocodiles live in tidal rivers, mangrove swamps, estuaries, and coastal wetlands from the eastern coast of India through Indonesia to the Gulf of Carpentaria in northern Australia. They are strong ocean swimmers and have colonized remote island groups far from the mainland.
Large adult male saltwater crocodiles typically weigh between 400 and 700 kilograms, with exceptional individuals exceeding 1,000 kilograms. Females weigh substantially less, generally between 150 and 200 kilograms, reflecting the pronounced sexual size difference seen throughout the species.
On land, saltwater crocodiles can gallop at roughly 17 kilometers per hour over short distances, though they tire quickly and rarely pursue prey on land. Their real hunting advantage is in water, where a lunging strike from the shallows can be completed in a fraction of a second.
No projects have listed this species yet. If you run a project that protects the Saltwater Crocodile, you can add it to Wildlife Connect.
