Blanket octopus pairs are some of the undersea world ... a modified arm that holds its sperm—and gives it to the female, who keeps it in the mantle cavity until needed for fertilization.

This female blanket octopus was between 35cm and 40cm in size. Photo: Christiaan Stopforth/Drone Fanatics SA Photographer and videographer Christiaan Stopforth had an extraordinary encounter with ...

It also occurs with some crustaceans, gastropods, and even octopuses. And while a female blue-lined octopus is usually about double the size of a male, they are still prone to hunger pangs after ...

2. Argonaut myth In 300 B.C. Aristotle described his vision of a female argonaut using her shell as a boat and her tentacles as sails and oars. In 2010 octopus experts Julian Finn and Mark Norman ...