Further names: Tuberão martelo
Size of adult animals: 250 – 350 cm
Prey: They feed on small sharks and rays, fish, shrimps, crabs, cephalopods.
Life cycle and behaviour: These animals reach sexual maturity at a length of about 300 cm. Females give birth to approx. 30 to 40 live pups which are sustained in the womb by a placenta-like structure that develops from the yolk sac. This means that hammerheads belong to the group of viviparous fish, all of which give birth to live young.
Habitat and range: Occurring globally in tropical and subtropical seas, both in coastal areas and in the open ocean. They usually swim in a depth of 0 to 20 m but can also dive deeper, to about 200 m.
Distinctive features: Characteristically wide head; olive-grey or dark grey back; white belly; the fins have a darker or black tip.
Taxonomy: Class: Chondrichthyes (Cartilaginous fish); Subclass: Elasmobranchii (Sharks and rays); Family: Sphyrnidae (Hammerhead sharks)
Threats: These sharks often die in fishing nets and are even actively hunted in some countries (for shark-fin soup). Their meat is considered a local delicacy, their liver is rich in oil, and their skin is processed into sanding materials. Some body parts are also used in traditional Chinese medicine.
Threats: Naval sonar exercises, pollution, bycatch and hunting amongst other. classified as Data Deficient by IUCN.