Octopuses that stand tall, darken and spread their web in a "Nosferatu pose" are likely displaying complex social interactions, according to new research.

A sleeping octopus whose colours changed overnight prompts marine biologists to question whether or not the eight-limbed mollusc may be dreaming.

Would you eat it? (Warning: contains distressing images)

A filmmaker forges an unusual friendship with an octopus living in a South African kelp forest, learning as the animal shares the mysteries of her world.

Children of Time