The adaptation is ancient: Ink sacs are present in fossils of octopus ancestors that are more than 300 million years old. Photographed at Dive Gizo, Solomon Islands.

An ink that changes colour when exposed to light, like an octopus does to match its surroundings, could one day be used for automatic camouflage.

TAMPA, Fla. (WFLA) — An ink-credible rare sight, caught on camera, catches an octopus as it changes its colors from white to orange. Video captured by Ciara Taylor, a Marine Conservation Society ...

A new light-activated ink can change color on demand. It’s made up of colored microbeads that rise in response to different wavelengths of light to change a surface color, which could be useful ...

It's only the world's third known octopus nursery. The research team may have also discovered a new species of Muusoctopus, a genus of small to medium sized octopus that lacks an ink sack.

An octopus in attack mode is the ocean’s version of a ninja. In the waters of the Mediterranean, these divers encountered an octopus. As they tried to get close, the octopus wasn't having it.

Octopuses have many amazing abilities and characteristics; they have huge brains and can solve puzzles; their ink can ...

A common octopus (Octopus vulgaris) releasing ink. Credit: Shutterstock. The most wonderful time of the year has arrived: Cephalopod Week, Science Friday’s annual tradition of spotlighting all things ...

A compound found inside octopus ink has been created artificially in the lab and used to kill cancer cells. The development could eventually lead to new cancer treatments. Martín Samuel ...

An octopus has been spotted changing colour in ink-credible footage from a Welsh beach. Beachgoers captured the rare sight of the curled octopus while looking in rock pools on Menai Bridge beach ...