Dog-faced Water Snake is one of the most widely distributed snake of Homalopsidae family. Also this is one of the most common serpent in mangroves and tidal rivers of its range. In India its distribution range is whole of costal region of mainland and Islands from Gujarat to West Bengal and Andaman & Nicobar Islands. Can be identified by checking brownish dorsal surface marked with darker bands or blotches. Ecologically this is one important component of mangroves and tidal rivers which checks the population of various fishes.