Sea Snakes [Squamata]
Description
Within the order Squamata, sea snakes, or marine elapids, represent a sub-group of venomous elapid snakes that have adapted to a fully aquatic life. They are found primarily in the tropical parts of the Indian and Pacific Oceans, with some species inhabiting coastal areas, mangroves, and open ocean environments. Sea snakes have evolved paddle-like tails for swimming, valved nostrils to prevent water intake, and a laterally compressed body to increase their hydrodynamic efficiency. They breathe air but can spend hours underwater thanks to their large lung that extends nearly the length of their body. Most species are highly venomous and feed on fish and fish eggs.