No kidding, sarcastic fringehead is the name of a real fish, a skinny little tiger no more than nine inches long that likes to live in cracks in the rocks, holes in the hard bottom, empty shells, and even beer bottles. They are aggressive and fearless, and will charge anything, including scuba divers that approach their lairs. Sarcastic fringehead are distinctive fish, with huge jaws, tufts of tissue on their heads (hence their name), and metallic blue, yellow-fringed spots on their dorsal fins. They are found from San Francisco Bay south to Baja, Mexico, and eat fish and other small denizens of the sea floor.