It's a sight you don't see often, or ever: a common octopus (Octopus vulgaris) apparently hitching a ride on the back of a Risso's dolphin (Grampus griseus) by clinging onto its fin. The photo was ...

They change shape and color, and squirt ink. But they also will return your gaze, "as if they're scrutinizing you." ...

Octopuses are fascinating animals – and serve as important model organisms in neuroscience, cognition research and developmental biology. To gain a deeper understanding of their biology and ...