The species Metasepia pfefferi is a cuttlefish that lives in the waters of South Asia to Australia. It is the only species of cuttlefish that walks along the ocean floor! Its common name is the flamboyant cuttlefish, and the video makes it clear why. It looks like a walking video billboard, with bands of color moving along its cuttlebone and other body parts. The video shows two flamboyant cuttlefish at the Shedd Aquarium in Chicago.
Why does it flash colors like that? One would think it is either a mating dance of sorts, or maybe a challenge to fight other cuttlefish over territory. But according to Wikipedia, this amazing light show is to announce its poisonous character. The colors scream, "Don't eat me!" And that's why they aren't hunted for human consumption- their flesh contains acids that are toxic, just as dangerous as the notorious blue-ringed octopus. People do seek the flamboyant cuttlefish out for their aquariums, however. -via Born in Space