
Sea snakes are venomous elapid snakes which inhabit marine environments for most or all of their lives. They are found in warm coastal waters from the Indian Ocean to the Pacific. Most sea snakes are completely aquatic and have adapted to their environment in many ways, the most characteristic of which is a paddle-like tail that has increased their swimming ability. The aim of the present study is to assess the diversity, biology and ecology of sea snakes (Family: Hydrophiidae) occurring in the Parangipettai coastal region, Southeast coast of India. It revealed the presence of ten species included in five genera. There is no detailed study on above aspects of sea snakes of Parangipettai. Hence, the present study was undertaken in this coast.