EAST LANSING, Mich., March 25 (UPI) -- U.S. scientists have announced the first-ever discovery of a two-headed bull shark, confirming it was a single shark with two heads, not conjoined twins.
Michigan State University researchers studying the specimen found in the uterus of an adult bull shark taken in the Gulf of Mexico April 7, 2011, said it was the first record of the phenomenon known as dicephalia ever seen in bull sharks although it has been seen before in other species of shark.