Slender-Necked Sea Snake
Hydrophis coggeri
A slender sea snake with a notably thin neck relative to its body, found in coral reef and coastal waters of the Coral Sea region.
- Adult length
- 0.9-1.3 m (3-4.3 ft)
- Range
- Coastal waters of northeastern Australia and the Coral Sea
Found a snake like this?
Identify any snake from a photo, free.
Overview
The slender-necked sea snake is a reef-associated marine elapid found in the waters off northeastern Australia and the wider Coral Sea. Its common name reflects its notably thin neck compared to a thicker mid-body.
It preys on small fish and is a generally retiring reef-dwelling species.
How to identify it
- Body noticeably thicker at mid-length than at the neck, giving a tapered, slender-necked profile
- Pale gray to olive coloration, sometimes with faint darker banding
- Small head
- Paddle-shaped tail
- Adults typically 0.9-1.3 m
Habitat & range
Inhabits coral reef and coastal waters, generally in clearer offshore waters compared to some estuarine sea snake species. Found off northeastern Australia and within the Coral Sea.
Behavior, diet & reproduction
Forages among reef structures for small fish. Reproduction is ovoviviparous, with live young born at sea.
Frequently asked questions
Why is it called the slender-necked sea snake?
Because its neck is noticeably thinner than its thicker mid-body, giving it a tapered profile.
Where does it live?
In coral reef and coastal waters of northeastern Australia and the Coral Sea.
What does it eat?
Small fish found among reef habitats.
Slender-Necked Sea Snake guides
In-depth guides for identifying and understanding Slender-Necked Sea Snake.
