Scientists are studying how the argonaut octopus evolved the ability to produce a floating shell-like structure to care for its offspring. By Sofia Quaglia Argonauta Argo is not a typical octopus.

A shellfish caught by a fisherman in Suruga Bay, Japan, was not what it first appeared, according to Storyful Video shows an octopus emerge from a shell and then leap off the side of a boat to return ...