Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living things, including humans. Tetrodotoxin is most famously known from pufferfish — ...

Unlike other octopus species, dumbo octopuses don't have ink sacks, presumably because they don't encounter as many predators at such great depths. 5. of 11. Blue-Ringed Octopus .

Kat Zhou has won the Aquatic Life category in the 2025 BigPicture Natural World Photography Competition, while a shot of a ...

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. The new species has been named Opisthoteuthis ...

Scientists using ROV found octopus with long arms, large eyes on ocean floor and discovered new species: Feitian’s Dumbo octopus, study said & photos show.

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 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 hunt.

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 ...

Video: Typical movement during multispecific group hunting, featuring the three major featured species in the paper (octopus, blacktip grouper, and ‘blue goatfish’).

But while other octopus species have evolved longer mating arms that allow them to maintain a safe distance during copulation and avoid this fate, blue-lined octopuses have a comparatively short ...