See text Disteira Lacépède, 1804 Hydrophis is a genus of sea snakes, venomous snakes in the subfamily Hydrophiinae of the family Elapidae.

Species in the genus Hydrophis are typically found in Indo-Australian and Southeast Asian waters.

Currently, around 36 species are recognized as being valid.

[1] [7] *) Not including the nominate subspecies (typical form).

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Hydrophis.