A blue-ringed octopus is one of several species of small octopuses that display small, bright blue rings on their body when they are alarmed. They live in tide pools and shallow reefs.

The Southern blue-ringed octopus (Hapalochlaena maculosa) is found up to 50 metres deep along Australia's southern coastline, including around Tasmania. It reaches about 22 centimetres long and its ...

Spike in sightings of tiny, but extremely venomous blue-ringed octopus brings scary headlines, but expert says octo-lypse is unlikely Latest U.S.