Sea snakes

genus of reptiles

legless reptiles living in the sea

species of reptile

alt=Drawing of multiple views of a vertebra, very high and laterally compressed, of the fossil sea snake Pterosphenus schucherti, from the original description of the species (Lucas, 1898).|left|thumb|The very high and narrow vertebra of Pterosphenus schucherti hint at the highly specialised aquatic lifestyle of the genus. Pterosphenus is an extinct genus of marine snake of the Eocene period.

Hydrelaps is a monotypic genus of venomous sea snake in the family Elapidae. The genus contains the sole species Hydrelaps darwiniensis, also commonly known as the black-ringed mangrove snake, the black-ringed sea snake, '''Darwin's sea snake, and the Port Darwin sea snake'''. The species is native to Australia and New Guinea.