New Guinea bockadam or Dog-faced Water Snake Cerberus rynchops is a species of a Colubrid snake found in coastal waters of Asia and Australia. C. rynchops is commonly found in mangroves: mudflats, streams, ponds, tidal pools, on algae patches, and has even been found burrowing into the mud. C. rynchops is rear-fanged and is mildly venomous. An aquatic and nocturnal snake, it feeds mainly on fish and is known to consume eels.