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Sea serpent

Although the name sea serpent has come to mean almost invariably a mythical sea monster, there are true sea snakes of several different species belonging to a group related to cobras. They are only moderately large. The body is compressed as an adaptation for swimming and the snakes are so thoroughly aquatic that they are either clumsy or helpless when brought ashore.

Sea snakes are poisonous. They have short grooved fangs[?] near the front of the upper jaw, and the poison acts on the nervous system like that of the related cobras.

Sea snakes are confined to the tropical[?] oceans, chiefly the Indian ocean and the western Pacific ocean. A single species, Pelamydrus platurus, extends to the eastern Pacific.

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