Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living ...

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

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.

A blue-lined octopus ("Hapalochlaena fasciata"), one of four described species of blue-ringed octopus species. Photo by Julian Finn, Museum Victoria. The venomous cephalopod above has a bit of a ...

But don’t villainize the blue-ringed octopus. She was just hanging out, hoping for a crab snack, when you went all Curious George on her. Of course it’s part of our nature to gawk at cool ...

The blue-ringed octopus appears grey or beige with light brown patches when it is at rest, but when agitated its 50 or 60 bright blue rings appear and pulsate with color, as a warning.

The venomous blue-lined octopus is one of many species that engages in sexual cannibalism. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

Cephalopods have colour-changing chromatophores on their skin, which allows them to camouflage themselves — but the blue-ringed octopus has a different trick up its tentacle.

There have only been three confirmed deaths from blue-ringed octopus bites—two in Australia and one in Singapore—however, some argue that this number is as high as 11. Read more ...