noun
great hammerhead
Refers specifically to the great hammerhead shark (Sphyrna mokarran).
ヒラシュモクザメはハンマーヘッドシャークの一種です。
The great hammerhead is a type of hammerhead shark.
シュモクザメ is the general term for hammerhead sharks, while ヒラシュモクザメ specifies the great hammerhead species.
Compound of 平 (hira, 'flat') + 撞木鮫 (shumokuzame, 'hammerhead shark'). The name describes the shark's distinctively wide, flat head shape.