Genus · Homalopsidae
Cantoria
The genus Cantoria contains a single species. It is not considered dangerous to humans.
About mangrove water snakes
Cantoria is a small genus of slender, aquatic mud snakes that hunt crabs and shrimp in the tidal mangroves of Southeast Asia.
Cantoria is a genus in the family Homalopsidae, the Indo-Australian mud snakes or water snakes. Homalopsids are a group of mostly aquatic, rear-fanged snakes with eyes and nostrils set high on the head and valved nostrils that seal underwater, all adaptations for life in muddy rivers, estuaries, and coastal mangroves. The best known member is Cantor's mangrove snake, Cantoria violacea, named for the naturalist Theodore Cantor. The genus contains only a couple of recognized species, so it sits at the small, specialized end of an otherwise diverse family.
These are slim, long-bodied snakes built for the tidal zone. Like other homalopsids they have a somewhat cylindrical body, smooth or weakly keeled scales, small upward-facing eyes, and the high-set nostrils typical of snakes that spend their lives in and around water. Cantor's mangrove snake is often patterned with darker bands or saddles over a paler ground color. They are found in the brackish mangrove forests, mudflats, and estuaries of South and Southeast Asia, where they move through the network of tidal channels and burrows rather than on dry land. Within the mangrove ecosystem they are crustacean specialists, feeding largely on crabs and shrimp rather than fish.
Cantoria snakes are rear-fanged, meaning they have enlarged grooved teeth at the back of the upper jaw and produce a mild venom used to subdue small prey. They are not considered dangerous to people, and there are no records of serious envenomation from this genus, but rear-fanged is not the same as harmless. Any wild snake can bite, identification in the field is easy to get wrong, and a wild venomous or rear-fanged snake should never be handled. If a bite occurs, do not attempt first aid procedures yourself; seek emergency care promptly, and in the United States you can call Poison Control at 1-800-222-1222 or contact local emergency services. Like most homalopsids these snakes are believed to be live-bearing, giving birth to small litters rather than laying eggs, and they are secretive, largely nocturnal animals that most people will never encounter.
Cantoria belongs to the Homalopsidae family (Mud & water snakes). Aquatic, mud-dwelling snakes with upward-facing eyes and nostrils. Stout, often drab snakes with upturned nostrils, found in or near muddy water.
Danger: Rear-fanged with mild venom; not considered dangerous to humans.
All species (1)
Keep learning
- What Is a Snake? Anatomy and the BasicsA clear overview of what makes a snake a snake: limbless body plan, anatomy, evolution from lizards, species diversity, and why they are ectothermic.
- How Snakes Move, Hunt, and EatHow snakes move without legs, hunt as ambushers or active foragers, kill by constriction or venom, and swallow prey wider than their head.
- What Do Snakes Eat?All snakes are carnivores. Learn what snakes eat, how diet changes with size and age, how often they feed, and how they hunt and swallow prey.
- Venomous vs Nonvenomous: How to Tell the DifferenceThe folk rules for telling venomous snakes apart, where each one fails, and why location-based identification beats guessing by sight.