The Collaborative International Dictionary
bonnet head
bonnet head \bonnet head\, bonnethead \bonnethead\n. (Zo["o]l.), small harmless hammerhead shark ( Sphyrna tiburio) of the southern United States and West Indies, having a spade-shaped head; abundant in bays and estuaries.
Syn: shovelhead, bonnet shark, Sphyrna tiburo.