High Quality Content by WIKIPEDIA articles! The scalloped bonnethead, Sphyrna corona, is a rare, little-known species of hammerhead shark, family Sphyrnidae. Its other common names include the mallethead shark and the crown shark. It is found in tropical and subtropical waters in the eastern Pacific Ocean, from Mexico to Peru, and possibly as far north as the Gulf of California. It frequents inshore habitats over soft bottoms (mud, sand, and gravel) to a depth of 100 m, and also enters mangroves and estuaries.