Cogger's Sea Snake
Hydrophis coggeri
A reef-associated sea snake of northern Australian and western Pacific waters, named for herpetologist Harold Cogger.
- Venomous?
- Venomous
- Adult length
- 1-1.3 m (3.3-4.3 ft)
- Range
- Coral reef waters of northern Australia and the western Pacific
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Overview
Cogger's sea snake is a coral reef-associated species found in warm waters off northern Australia and parts of the western Pacific, including reefs around New Caledonia and Fiji. It belongs to the diverse Hydrophis group of true sea snakes.
It is typically encountered over coral or rocky reef substrates rather than the soft muddy bottoms favored by many estuarine sea snakes.
How to identify it
- Banded body pattern with alternating dark and light coloration
- Moderately robust build compared to slender estuarine relatives
- Small head not clearly distinct from the neck
- Paddle-shaped, laterally compressed tail
- Reef association and banding pattern help distinguish it from muddy-water Hydrophis species
Habitat & range
Found over coral reefs and rocky substrates in warm coastal waters of northern Australia and the western Pacific. Prefers clearer water than many of its estuarine relatives, often near reef drop-offs and lagoons.
Behavior, diet & reproduction
Hunts small reef fish, using its paddle tail to maneuver among coral structures. Fully aquatic and gives birth to live young at sea. Generally avoids divers and swimmers, showing little aggression when encountered.
Frequently asked questions
Is Cogger's sea snake dangerous?
It is venomous, but it is not aggressive and rarely interacts negatively with humans.
Where is it found?
Over coral reefs in warm waters of northern Australia and the western Pacific.
Who is it named after?
The species commemorates Australian herpetologist Harold Cogger.
What does it eat?
Small reef-dwelling fish, hunted among coral and rocky structures.
Cogger's Sea Snake guides
In-depth guides for identifying and understanding Cogger's Sea Snake.
