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.

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 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.

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 ...

Ink. When discovered, an octopus will release a cloud of black ink to obscure its attacker's view, giving it time to swim away. The ink even contains a substance that dulls a predator's sense of ...

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 ...

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

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.

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 ...

The octopus in the video is believed to be a common octopus, which is not known to be dangerous s to humans. They can grow up to 1.3 metres in length, and can weigh between 6.6 to 22 lbs ...

Octopus strangles diver, sprays blinding ink in his face. Terrifying footage shows the moment an octopus latches onto a snorkeller and sprays blinding ink in his face after its home was disturbed.