These five research-backed insights show why the octopus remains one of the most extraordinary minds in the animal kingdom.

Octopuses are fascinating sea creatures. Some species have unique features. The blue-ringed octopus has striking blue rings. The dumbo octopus lives deep in the ocean. The coconut octopus uses shells ...

A mysterious deep-sea creature has just helped scientists solve a long-standing evolutionary puzzle. The vampire squid—an unusual animal that looks like a mix between an octopus and a squid—has ...