What kind of animal is a sea snake?

Sea snake, a subfamily of Agkistrodon halys. Similar to Cobra subfamily, they are all poisonous snakes with anterior sulcus teeth. The tail is as flat as an oar, and the back of the trunk is slightly flat. There are 38 species of 13 genus in this subfamily. Warm waters are distributed in the Persian Gulf in the west, Japan in the east and Australia in the south, but there are no sea snakes in the Atlantic Ocean.

Sea snakes, also known as "blue-ringed sea snakes" and "spotted sea snakes", are reptiles living in the ocean. Toxic. Length 1. 5-2 meters. Its trunk is slightly cylindrical, its body is slender, its rear end and tail side are flat, and its back is dark gray.