Yellow-bellied sea snake

Overview

The yellow-bellied sea snake has an elongated head distinct from its moderately built body. The Australian Museum describes a dark upper half sharply separated from a yellowish lower half, and a yellow paddle-shaped tail carrying dark spots or bars. Body scales are small and smooth, while head scales are larger and regular. It occupies open ocean waters and eats fish, including prey attracted beneath a motionless surface snake. Its body can undulate to move forward or backward.

A field study of Hydrophis, also historically called Pelamis, platurus found that oceanic life does not remove its need for fresh water. Snakes captured after prolonged drought had lower body water and condition and were more inclined to drink fresh water than those captured after rainy periods. The researchers report that these snakes do not drink seawater and rehydrate from surface freshwater lenses formed during heavy rain. These results describe water balance during seasonal drought, rather than a universal prediction of survival at every location.

Origins & earliest records

Museum anatomy and a retained primary dehydration-study abstract.

Evidence & interpretation

Retained scientific and institutional passages.

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

1. 01

   Yellow-bellied Sea Snake

   Cecilie Beatson

   Pelamis heading and Hydrophis caption refer to same subject.

2. 02

   Pelagic sea snakes dehydrate at sea

   Indexed primary abstract retained; author names not captured.

Family & connections

A source-supported family tree or inspiration record has not yet been compiled for this profile. Related reading below indicates a connection in subject matter, not a proven lineage or creative influence.

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

1. Scientific or institutional accountYellow-bellied Sea SnakeResearch access: 2026-10-12
2. Scientific or institutional accountPelagic sea snakes dehydrate at seaResearch access: 2026-10-12

Image credits

Modern AI interpretation of a whole yellow bellied sea snake.

Modern AI selected sea-snake interpretation; fine scales schematic, no drinking measurement pictured.