Species · GBIF taxon 2289324
Greater Blue-ringed Octopus
Hapalochlaena lunulataAlso known as Blue-ringed Octopus, Greater Blue-ring Octopus
Greater blue-ringed octopuses are masters of camouflage that blend seamlessly into coral reefs and sandy shallows until threatened, when they flash brilliant, iridescent blue rings as a warning. They hunt primarily at night, using a powerful neurotoxin called tetrodotoxin to paralyze crabs and small fish before consuming them. Despite their tiny size, they carry enough venom to kill multiple adult humans, making them one of the ocean's most formidable creatures.
VenomousMarineNocturnal
- diet
- Crabs, shrimp, and small fish
- family
- Octopodidae
- threats
- Habitat destruction, climate change, marine pollution, and collection for the aquarium trade
- life Span
- About 1 to 2 years
NE
Carries a highly lethal neurotoxin; never touch or handle under any circumstances.
Produces tetrodotoxin, a potent neurotoxin that causes motor paralysis and respiratory failure within minutes.
Never handle this animal or pick up shells or debris where it might be hiding; seek immediate emergency medical care if bitten.- Keep your distance: Observe from a safe distance and never attempt to touch or corner them.
- Watch for warning signs: Look for the sudden, bright flashing of iridescent blue rings on their body.
- Check tide pools carefully: Be cautious when exploring shallow reef flats where they may hide in crevices.