Octopuses possess nine brains, consisting of one central brain and eight smaller brains dedicated to controlling each arm or leg.
Most octopuses inhabit coastal areas and build their homes among rocks and corals.
Octopuses can change their colour to blend in with their surroundings for camouflage.
An octopus has three hearts, with one pumping blood through its organs and the other two circulating blood through its gills.
Octopus blood contains hemocyanin, a copper-based protein that gives it a blue coloration.
Octopuses are thought to possess venom produced by bacteria residing within their bodies.
Adult octopuses feed on crabs, snails, small fish, and occasionally prey on other octopuses.