This octopus hatchling is taking one of its first swims in the depths off Costa Rica. The animal’s egg was on El Dorado Hill, an undersea mount for which the dorado octopus species is named.
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.
