From Gizmodo comes this fascinating National Geographic video about cuttlefish. These deadly predators can project light sequences over the surface of their bodies. This ability can be used for camouflage to hide from enemies, but also to capture the attention of prey. Certain light sequences hypnotize other sea creatures, giving the cuttlefish time to get close enough to snatch them with projectile tentacles.
They're like swimming techno dance clubs that hunt and kill you.