True sea snakes

True sea snakes, viviparous sea snakes, or coral reef snakes (tribe Hydrophiini), are a group of elapid snakes that inhabit marine environments for most or all of their lives. They comprise 62 species divided among 15 genera.

Most sea snakes are venomous, except the genus Emydocephalus, which feeds almost exclusively on fish eggs. True sea snakes are extensively adapted to a fully aquatic life and are unable to move on land, unlike the sea kraits, which have limited land movement. They are found in warm coastal waters from the Indian Ocean to the Pacific and are closely related to venomous terrestrial snakes in Australia.