Blue-ringed octopuses are undeniably stunning. When they are alarmed, these animals will show off the eponymous iridescent blue rings that cover their body and arms. But their adorably small size and ...

Jon Ablett, who cares for the cephalopod collection at the Natural History Museum ... Finally, why do octopuses have blue blood? Are you still wondering why octopus blood is blue and what the three ...

The animal is one of four species of the extremely venomous blue-ringed octopus and is known as a blue-lined octopus due to its non-circular markings. Blue-lined octopuses (Hapalochlaena fasciata ...

Imagine a creature so bizarre that it feels straight out of a science fiction novel—a being with not just one, but three hearts, and an astonishing nine brains. This is not a mythical sea monster but ...