But while other octopus species have evolved longer mating arms that allow them to maintain a safe distance during copulation and avoid this fate, blue-lined octopuses have a comparatively short ...

Argonaut (Argonauta argo) must go through to send baby argonauts out into the world. This octopus species lives in open water in Earth’s tropical and subtropical seas. It’s not the easiest ...

Blanket octopus pairs are some of the undersea world’s oddest couples. What’s so startling is the size difference: Males are about the size of a walnut—less than an inch long—but some ...