Scientific name: Sphyrna mokarran
Spanish name: Gran Tiburón Martillo

Description: it is easy to recognize because of its broad and thick head, which has an almost flat leading edge, except for an indentation in the center. It is gray-brown above, grading to a paler color below. The first dorsal fin is extremely long and sharp, with a curved margin.

Size: they reach 3.5 meters, there are reports of individuals of 6 meters.

Distribution: this shark is distributed in nearly all warm temperature and tropical waters including western and eastern North Atlantic, Indo-West and eastern Pacific. It occurs in coastal areas above continental and island shelves and adjacent offshore waters to depths of about 20 meters. Divers are likely to see it in shallow waters close to shore, especially near coral reef drop offs and adjacent sand habitats. It makes long migrations to cooler waters during the summer months.

Feeding: its diet consists of a broad variety of fishes, associated with the water column, including sardines, herring, tarpon, and jacks, and benthic species such as grouper, sea cats, flatfish and croacker. But this shark is best known for its preference for other elasmobranchs, such as stingrays, skates, and other sharks. In its voracious and unique predatory behavior toward stingrays, the great hammerhead uses the side of its head to pin a fleeing ray to the bottom. It then rotates its head to the side and cleanly bites off a large chunk of the ray's wing. It continues to circle and feed of the incapacitated prey until it has been totally consumed.

Reproduction: females reach sexual maturity when about 3 meters long. Generally produced 20 to 30 offsprings, which are 70 cm at birth.