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

But for Octopus briareus and many other octopus species, the story has a nasty ending. After a mother octopus lays a clutch ...

The octopus is one of the world’s most alien creatures, but nothing puts that into perspective more than the physiological differences between them and the creatures we’re most familiar with. Like ...

Discover eleven octopus species that highlight the beauty and diversity of the Octopoda order, from the giant Pacific octopus to the mimic octopus.

A Casper octopus photographed deep underwater. Discovered in 2016, this is the first time this rare octopus species—yet to receive its scientific name—has been seen in the Southern Pacific.

A new species of flapjack octopus, with massive eyes and blood-red tentacles, has been discovered from a deep-sea canyon off the coast of Australia.

A new study found that some members of an octopus species hunt cooperatively in groups with fish. Video shows octopuses punching their companion fish to keep them on task and contributing to the ...

An octopus patrols a shallow reef, searching for food–and it’s not alone. A flurry of fish move alongside it, in a group hunting phenomenon observed in multiple marine locations around the world.

But in their defense, scientists have observed in the last decade that some octopus species may be more social than others, with some octopuses living in groups of ten or more.

The venomous blue-lined octopus is one of many species that engages in sexual cannibalism.

The Carnarvon flapjack octopus was collected by scientists on a 2022 CSIRO research voyage, but it wasn't named until last week. The species is one of a number of newly-described species collected ...

While an octopus-dominated future may seem "improbable" at the moment, it "wouldn’t be the first time that an ocean-dwelling species took advantage of a land species extinction to adapt and ...