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iki jime Fish Finder
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Also known as:

Great hammerhead

Hoe-head shark

Common Group Name:

Sharks

Family Name:

Sphyrnidae

Genus Name:

Sphyrna

Species Name:

Sphyrna mokarran


Dispatch Method:

Beware of the sharp teeth of sharks when handling them. The eating qualities of hammerhead sharks less than 120 cm (4 feet) long can be improved by killing them humanely by iki jime or a firm knock to the head before placing them in an ice slurry after bleeding. Hammerhead sharks larger than around 120 cm (4 feet) long should be dispatched with a captive bolt tool or firearm (with appropriate safety precautions).


Fish Description:

  • A large hammerhead shark, grey to bronze grey above becoming white below.
  • The front margin of the head whilst curved in juveniles (see thumbnail pic) is almost straight in adults with a slight central notch.
  • The first dorsal fin is very tall and curved with a pointed tip, and the second dorsal and pelvic fins are also tall with deeply concave rear margins.
  • Females mature at between 8-10 years old and 210-300 cm/7-10 feet long. They can live for at least 44 years, producing litters of 6 to 42 young every 2 years.
  • Great hammerheads eat a wide variety of fishes, sharks, and rays.
  • This species is dangerous and responsible for fatal attacks on humans.

Fish Distribution:

  • Great hammerhead sharks occur worldwide throughout tropical and warm temperate waters from shallow inshore waters to offshore at depths of at least 300 m (1000 feet).

Fish Size Common Length:

Common between 210 and 300 cm (7-10 feet) long, maximum size at least 600 cm (20 feet) long and 580 kg (1280 pounds).