Scalloped hammerhead
The scalloped hammerhead was first known as Zygaena lewini. It was renamed Sphyrna lewini in 1834. It has also been known as Cestracion leeuwenii in 1865, Zygaena erythraea in 1871, Cestracion oceanica in 1913, and Sphyrna diplana in 1941. The word Sphyrna is a Greek word meaning "hammer". It refers to the shape of the shark's head.