Cuttlefish not only change their colour to match their surroundings. They have what appears to be a language of thousands of colours and gestures. Researchers studying cuttlefish in tanks find that they swim up to the side of the tank and make specific colour displays when certain researchers enter the room. This seems to indicate recognition and memory, the desire to communicate. Perhaps they are saying, "Ohayo!" or "Good Morning!" or "You again. Did your mother dress you? You are such a loser." No one knows. But it seems they are saying something.

Cuttlefish, octupi, and squid are common in Mediterranean and Asian diets. Dried cuttlefish are packaged as cheap snacks...