the world > animals > fish > subclass Elasmobranchii > order Pleurotremata > [noun] > member of family Sphyrnidae (hammer-head) (4)
the hammer-headed shark (Squalus zygæna).
Ichthyology. A fish of the genus formerly so named (now Sphyrna), comprising the hammerheaded sharks.
A hammer-headed shark; so called from the great lateral expansions of the head.