Crocodylus porosus grows to more than 7 meters and is probably the largest living crocodile. Osteolaemus tetraspis reaches only 2 meters. Gavialis reaches 6.5 metes and Tomistoma about 4 meters. Alligator sinensis in China. Pakistan east to Indochina and south to Indonesia.
All crocodiles are more or less aquatic.
Alligator mississippiensis even enters coastal marine waters. Fishes, turtles, birds, mammals and other animals. Small crocodiles eat insects, frogs, and other small animals living in or near water. Gavialis and Tomistoma east mostly fish. They are territorial during the breeding season and aggressively warn intruders, often with vocalizations.