The oldest known octopus fossil belongs to an animal that lived some 296 million years ago
Two of the hearts work exclusively to move blood beyond the animal’s gills, while the third keeps circulation flowing for the organs.
he world “octopus” comes from the Greek, októpus, meaning “eight foot.”
Two-thirds of an octopus’ neurons reside in its arms, not its head.
The ink also physically harms enemies. It contains a compound called tyrosinase, Which, in humans, helps to control the production of the natural pigment melanin.
To survive in the deep ocean, octopuses evolved a copper rather than iron-based blood called hemocyanin, which turns its blood blue.
According to Courage, the image takes inspiration from a legend about a female shell diver who is chased by sea creatures, Included octopuses, after attracting the eye of a sea dragon god.
Mating and parenthood are brief affairs for octopuses, who die shortly after.
As for the females, they can lay up to 400,000 eggs, which they obsessively guard and tend to.