The Family Acrochordidae, known as file snakes, is a small group of nonvenomous, aquatic snakes found in South and Southeast Asia, New Guinea, and northern Australia. They are easily recognized by their loose, baggy skin covered in rough, keeled scales that give them a file-like texture. Adapted to a fully aquatic lifestyle, they have nostrils positioned on top of the head, allowing them to breathe while submerged, and their bodies are flattened for swimming. File snakes are slow-moving ambush predators that feed mainly on fish, capturing prey with their rough scales instead of constriction. Uniquely among snakes, they do not have enlarged belly scales, making them nearly helpless on land.