Quick answer
Hammerhead sharks are a family of sharks instantly recognizable by their wide, flattened, hammer-shaped heads, which spread their eyes and sensory organs far apart. This shape gives them excellent vision and a heightened ability to detect the faint electrical signals of hidden prey such as stingrays. Hammerheads range from small species to the great hammerhead, which can exceed 6 meters (20 ft) long.
Key takeaway
Hammerhead sharks are a family of sharks instantly recognizable by their wide, flattened, hammer-shaped heads, which spread their eyes and sensory organs far apart. This shape gives them excellent vision and a heightened ability to detect the faint electrical signals of hidden prey such as stingrays. Hammerheads range from small species to the great hammerhead, which can exceed 6 meters (20 ft) long.
Overview
Hammerhead sharks are a family of sharks instantly recognizable by their wide, flattened, hammer-shaped heads, which spread their eyes and sensory organs far apart. This shape gives them excellent vision and a heightened ability to detect the faint electrical signals of hidden prey such as stingrays. Hammerheads range from small species to the great hammerhead, which can exceed 6 meters (20 ft) long.
Biology
Hammerhead Shark (Sphyrnidae) is classified as Fish with conservation status Critically Endangered. Typical weight about 230 kg; lifespan around 20–30 years or more.
Ecology
Diet: Carnivore. Habitat: Warm coastal and open oceans worldwide. Movement and social systems reflect those pressures.
People and this species
Learn before you travel or keep related pets. Wild individuals are not toys; captive care needs species-specific husbandry.
Further reading
See the full Hammerhead Shark profile for FAQs, taxonomy, and related guides on this site.
The hammer-shaped head
The wide, flattened head, called a cephalofoil, sets eyes and nostrils far apart, giving hammerheads a broad field of vision and a strong sense of smell. The underside is packed with electroreceptors that detect the tiny electric fields of animals buried in the sand. Sweeping the head over the seafloor like a metal detector, the shark sniffs out hidden prey.
Diet and hunting
Hammerheads are skilled predators that hunt fish, squid, octopuses, crustaceans, and especially stingrays. Some use the broad head to pin a stingray against the seafloor before eating it, and they seem largely unbothered by the rays' venomous barbs. They often feed near the bottom in shallow coastal waters.
Behavior and range
Hammerheads live in warm coastal and open waters around the world. Some species, such as the scalloped hammerhead, famously gather in large schools by day near seamounts and islands, then disperse at night to hunt. Many undertake seasonal migrations to cooler waters.
Conservation
Several hammerhead species are in serious trouble, with the great and scalloped hammerheads listed as Critically Endangered. They are heavily targeted and accidentally caught for their large fins, which are prized in the shark-fin trade, and they reproduce slowly. International trade restrictions now aim to reduce the pressure on them.
Research notes
Figures for hammerhead sharks (Sphyrnidae) come from field studies, museum records, and conservation assessments that do not always agree on exact averages. Prefer ranges over single-point claims, and check whether a source describes wild, captive, or mixed populations.
Practical takeaways
If you encounter hammerhead sharks in the wild, prioritise distance and local guidance. If you care for related domestic or captive animals, match diet and housing to species needs rather than generic pet advice. Share accurate status information (Critically Endangered) when discussing conservation.
Sources
FAQs
Hammerhead Shark: Key Facts & Natural History?
Hammerhead sharks are a family of sharks instantly recognizable by their wide, flattened, hammer-shaped heads, which spread their eyes and sensory organs far apart. This shape gives them excellent vision and a heightened ability to detect the faint electrical signals of hidden prey such as stingrays. Hammerheads range from small species to the great hammerhead, which can exceed 6 meters (20 ft) long.
What is the scientific name of the hammerhead shark?
Sphyrnidae
What do hammerhead sharks eat?
Carnivore
Where do hammerhead sharks live?
Warm coastal and open oceans worldwide
Are hammerhead sharks endangered?
Listed here as Critically Endangered. Check IUCN and national lists for the latest assessment.