Elapidae
Northwestern Mangrove Sea Snake
VenomousEphalophis greyae



3 photographs of the Northwestern Mangrove Sea Snake. (c) Nathan Beerkens, some rights reserved (CC BY-NC).
The Northwestern Mangrove Sea Snake (Ephalophis greyae) is a venomous snake in the Elapidae family, recorded in 1 country.
If you are bitten
This is a venomous snake. Treat any bite as a medical emergency: stay calm, keep the bitten limb still and roughly level with the heart, remove rings and tight clothing, and get to emergency care immediately. Do not apply a tourniquet, cut the wound, apply ice, or try to suck out venom. Call your local emergency number or poison center.
- Family
- Elapidae
- Danger
- high
About the Northwestern 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.
Etymology
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.
Geographic range
E. greyae is found along the northwestern coast of the Australian state of Western Australia, from Shark Bay to Kimberley Region.
Habitat
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).
Description
A small species of sea snake, E. greyae may attain a total length (including tail) of 66 cm (26 in).
Diet
E. greyae preys upon fishes, especially gobies and their eggs.
Reproduction
E. greyae is viviparous.
Adapted from Wikipedia, available under CC BY-SA.
Frequently asked: Northwestern Mangrove Sea Snake
- Is the Northwestern Mangrove Sea Snake venomous?
- Yes. The Northwestern Mangrove Sea Snake (Ephalophis greyae) is venomous and belongs to the Elapidae family (cobra, mamba, coral or sea snake). Its bite is considered high risk to people. Treat any bite as a medical emergency.
- Is the Northwestern Mangrove Sea Snake poisonous?
- Snakes are venomous, not poisonous. "Poisonous" means harmful to eat or touch; "venomous" means injecting toxins through a bite. The Northwestern Mangrove Sea Snake is venomous, delivering venom through a bite.
- Is the Northwestern Mangrove Sea Snake dangerous?
- This is a venomous snake. Treat any bite as a medical emergency: stay calm, keep the bitten limb still and roughly level with the heart, remove rings and tight clothing, and get to emergency care immediately. Do not apply a tourniquet, cut the wound, apply ice, or try to suck out venom. Call your local emergency number or poison center.
- Where does the Northwestern Mangrove Sea Snake live?
- The Northwestern Mangrove Sea Snake has verified records in 1 country, including Australia. See the distribution section below for its full range.
- What does the Northwestern Mangrove Sea Snake eat?
- E. greyae preys upon fishes, especially gobies and their eggs.
- Why is it called the Northwestern Mangrove Sea Snake?
- 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.
If you are bitten by the Northwestern Mangrove Sea Snake
Do
- Get away from the snake and stay calm. Most bites worsen when people panic or try again to handle the snake.
- Call 911 or Poison Control (1-800-222-1222) right away. Antivenom works best when given early.
- Note the time of the bite and, from a safe distance, the snake's color and pattern, a phone photo is enough. Do not chase it.
- Keep the bitten limb still and at roughly heart level. Sit or lie down and limit movement.
- Remove rings, watches, and tight clothing near the bite before swelling starts.
- Gently wash the bite with soap and water and cover it with a clean, dry dressing.
Do not
- Do not cut the wound or try to suck out the venom.
- Do not apply a tourniquet or ice.
- Do not drink alcohol or caffeine.
- Do not take aspirin or ibuprofen, they can worsen bleeding. Acetaminophen is safer for pain.
- Do not try to catch or kill the snake. A dead snake can still bite by reflex.
First-aid guidance adapted from the U.S. Centers for Disease Control and Prevention (CDC NIOSH), Venomous Snakes. Educational only; always follow the instructions of emergency responders.
Where it is found
More Elapidae snakes
Classification
How scientists group this snake, from the broadest category down to the exact species. Each step narrows to its closest relatives.
- OrderThe broad group of scaled reptiles: all snakes and lizards
- Squamata
- FamilyA group of related snakes that share key traits
- Elapidae
- GenusA close-knit group of very similar species
- Ephalophis
- SpeciesThis exact snake, named in the two-part scientific name
- Ephalophis greyae
Keep learning
- Are Snakes Dangerous? The Real Risk, in PerspectiveMost snakes are harmless and avoid people. Here is the honest picture of snakebite risk worldwide and how to lower your own.
- Snakebite First Aid: What to Do (and What Never to Do)A clear, CDC-based guide to snakebite first aid: the steps that help, the popular myths that hurt, and how to tell a serious bite from a minor one.
- Venomous vs Nonvenomous: How to Tell the DifferenceThe folk rules for telling venomous snakes apart, where each one fails, and why location-based identification beats guessing by sight.
- What to Do If You Find a SnakeFound a snake at home or on a trail? Here is how to stay calm, give it space, identify it safely, and know when to call a professional.
Distribution from GBIF & iNaturalist. Venom status per CDC. Background: Wikipedia. Informational only. Never handle a snake to identify it.







