This intimate view of a female dorado octopus shows the detail of her suckered tentacles, curled up around her mantle.
The hectocotylus is both a reproductive and sensory organ, Harvard scientists and others have found.
Marine scientists in New Zealand have documented the world's weirdest road trip pairing.
The cephalopods team up with a variety of fish for hunting, and that results in some complex relationship dynamics that can include violence.
A recent expedition to the waters of Costa Rica has yielded new discoveries about deep sea octopuses.
Photo: Schmidt Ocean Institute 
