North-western Mangrove Sea Snake

North-western Mangrove Sea Snake

Ephalophis greyae

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability Insufficient data
at Ningaloo Marine Park
4 Verified sightings at Ningaloo Marine Park From 2019 to 2026
4 Verified sightings across 1 park From 2019 to 2026
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the North-western Mangrove Sea Snake

Grey's mudsnake (Ephalophis greyae), also known commonly as Grey's sea snake, the mangrove seasnake, and the north-western mangrove sea snake, is a species of venomous snake in the subfamily Hydrophiinae of the family Elapidae. The species is endemic to northwestern Australia.

Its specific name, greyae, has also been spelled greyi; however, it was named after a Beatrice Grey who collected the holotype, necessitating a feminine possessive. E. greyae is found along the northwestern coast of the Australian state of Western Australia, from Shark Bay to Kimberley Region.

The preferred natural habitats of E. greyae are mud flats, salt flats, the marine intertidal zone, and the marine neritic zone, to a depth of 10 m (33 ft). A small species of sea snake, E. greyae may attain a total length (including tail) of 66 cm (26 in).

E. greyae preys upon fishes, especially gobies and their eggs. E. greyae is viviparous. Cogger HG (2014). Reptiles and Amphibians of Australia, Seventh Edition. Clayton, Victoria, Australia: CSIRO Publishing. xxx + 1,033 pp. ISBN 978... Wikipedia →

Closest Relatives at Ningaloo Marine Park

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Daily sighting probability
1 Ningaloo Marine Park 🇦🇺 Australia
Insufficient data

More parks will be added in future updates.

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