Saltwater Crocodile ("Crocodylus porosus") is a crocodile native to saltwater environments and brackish wetlands from the east coast of India through Southeast Asia and the Sudanic region to northern Australia and Micronesia. It has been listed as least of concern on the International Union for Conservation of Nature (IUCN) Red List since 1996. It has been hunted for its skin since the 1970s, and is endangered by illegal killing and habitat destruction. It is considered unsafe for people who share the same area.

The saltwater crocodile is the largest living reptile and crocodile known to science. Males have a length of up to 6 m (20 ft), occasionally reaching 6.3 m (21 ft) or a weight of 1,000–1,300 kg (2,200–2,900 lb). Females are much smaller and only reach 3 m. (10 ft). It is also known as the estuarine crocodile, the Indo-Pacific crocodile, the marine crocodile, the water crocodile or the informal saline.

The saltwater crocodile is a huge, opportunistic, hypercarnivores apex predator. It ambushes most of its prey and either drowns or swallows it. It is capable of prevailing over almost any animal approaching its territory, including other apex predators such as sharks, freshwater and saltwater fish types, including pelagic species, invertebrates such as crustaceans, various reptiles, birds and mammals, including humans.

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