Dog-Faced Water Snake
Cerberus rynchops
A common, blunt-snouted brackish-water snake of Asian estuaries and mangroves, named for its somewhat dog-like facial profile.
- Venomous?
- Mildly venomous
- Adult length
- 0.5-1 m (1.6-3.3 ft)
- Range
- South and Southeast Asia
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Overview
The dog-faced water snake is a widespread, highly aquatic species found throughout the estuaries and coastal wetlands of South and Southeast Asia. Its common name refers to its distinctively blunt, elongated snout.
It possesses mild rear-fanged venom used primarily to subdue small prey and is not considered medically significant or dangerous to humans.
How to identify it
- Blunt, somewhat elongated snout giving a dog-like facial profile
- Dorsal coloration variable, typically brown, gray, or olive with darker blotches or bands
- Eyes positioned high on the head, an adaptation for a mostly submerged lifestyle
- Rough or weakly keeled scales in many populations
- Stocky, moderately muscular body
- Adults typically 0.5-1 m in length
Habitat & range
Inhabits estuaries, mangroves, tidal mudflats, and brackish coastal waters across South and Southeast Asia, from India and Sri Lanka through Myanmar, Thailand, Malaysia, and Indonesia. Tolerates a range of salinities and is commonly encountered in intertidal zones and coastal marshes.
Behavior, diet & reproduction
Primarily nocturnal, hunting fish and crustaceans in shallow brackish water. Uses mild rear-fanged venom to help subdue small, active prey.
Generally non-aggressive toward humans. It is a live-bearing species, producing moderate-sized litters of live young.
Frequently asked questions
Is the dog-faced water snake venomous?
It is mildly venomous with rear fangs used to subdue prey, but it is not considered dangerous or medically significant to humans.
Why is it called the dog-faced water snake?
Its blunt, elongated snout gives it a facial profile reminiscent of a dog.
Where is the dog-faced water snake found?
It occurs in estuaries and coastal brackish waters across South and Southeast Asia.
What does the dog-faced water snake eat?
It primarily preys on fish and crustaceans in shallow coastal waters.
Dog-Faced Water Snake guides
In-depth guides for identifying and understanding Dog-Faced Water Snake.
