When a Squid Listens to Cypress Hill: Insane in the Chromatophores

Scientists at the Marine Biological Laboratory in Woods Hole, Massachusetts hooked a squid up to a special iPod playing Cypress Hill’s 1993 hit Insane in the Brain. This view (through an 8x microscope) shows how the dorsal side of the caudal fin of that squid responded to that electrical signal. If you want to know more, here's a link to their research paper: Neural Control of Tuneable Skin Iridescence in Squid.