Sphyrna lewini
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Scalloped hammerhead sharks face severe population declines primarily due to intensive fishing pressure, with their distinctive fins highly valued in the shark fin trade. Their tendency to form large aggregations around seamounts and coastal areas makes them particularly vulnerable to targeted fishing and bycatch in commercial fisheries. Slow reproductive rates, with females not reaching maturity until 15-20 years of age, severely limit the species' ability to recover from overfishing pressure.
Habitat
Scalloped hammerheads inhabit tropical and warm temperate coastal waters, typically found from the surface to depths of 450 meters around continental shelves, islands, and seamounts. Juveniles prefer shallow coastal nursery areas including mangroves and estuaries, while adults form large aggregations around seamounts and offshore islands.
