\Sea" snake`\ (Zo["o]l.)
Any one of many species of venomous aquatic snakes of the
family {Hydrophid[ae]}, having a flattened tail and living
entirely in the sea, especially in the warmer parts of the
Indian and Pacific Oceans. They feed upon fishes, and are
mostly of moderate size, but some species become eight or ten
feet long and four inches broad.