Bumpy Head
Credit: PLoS ONE http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0038120

The dominant male, showing scale damage on back and side, is shown here following the head-butting bout. The giant bumphead parrotfish (Bolbometopon muricatum), which can reach 4 feet (1.3 meters) long and 100 pounds (46 kg), is named for its bulbous foreheads (shown here); its eccentric look gets a boost from the pouty lips and yellowish-to-pink face.