Although the cuttlefish may be best known for making those flat cuttlefish bones that your pet bird nibbles to get calcium, this paper shows that it should be known for being a lying cheater.
Cuttlefish, like their relatives the squids and the octopuses, are masters of visual communication. They can change their appearance almost instantaneously (video here), and they use color and pattern to say things like “Back off, I’m angry!” and “Pretty lady, I would like to do some romance with you now,” and “Please don’t do romance with me, I am male.”