The octopus is known for a number of things: its flexible body, ink squirts, and of course, eight arms. With about 300 species, these cephalopods inhabit every ocean of the world and can be found on ...
Cephalopods, like humans, have camera-like eyes that focus light with a lens. The two-spot octopus gets its name from the ocelli, or iridescent blue spots, which are false eyes to startle predators ...