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.

The vast majority of octopus species live along the sea floor--whether that is in the sandy shallows off a tropical coast or in the dark depths around hydrothermal vents. But a handful of octopuses ...

I can’t imagine the wonder and surprise I would feel at coming across an octopus nestled in a whelk shell, right in the shallows. That is what happened to Curtis Warrenfeltz and Laura Horan on the ...