Scalloped Hammerhead Shark

Photo Credit: Arthur Koch - Cocos Islands

Scientific Name: Sphyrna lewini

Description: The scalloped hammerhead shark is characterized by its unmistakable hammer-shaped head, known as a cephalofoil, which is laterally extended into a broad and scalloped shape. Its eyes are positioned at the ends of the cephalofoil, providing the shark with enhanced binocular vision and depth perception. The body of the scalloped hammerhead is streamlined and muscular, with a gray to olive-green coloration on its dorsal surface and a lighter shade on its ventral surface, providing effective camouflage from both above and below. Adult individuals can reach lengths of up to 12 feet (3.7 meters) or more, with females typically growing larger than males.

Habitat: The scalloped hammerhead shark inhabits a wide range of marine environments, including coastal waters, coral reefs, and offshore habitats in tropical and subtropical regions worldwide. They are versatile predators, feeding on a variety of prey items, including small fish, squid, crustaceans, and other marine organisms, which they capture using their specialized hammer-shaped heads and sharp teeth.

Behavior: When encountered by divers exploring their underwater habitat, scalloped hammerhead sharks typically exhibit a wary yet curious response. These solitary and pelagic sharks are known for their cautious demeanor and may approach divers with caution to investigate their presence. However, they are also sensitive to sudden movements and disturbances and may quickly retreat into deeper waters if they feel threatened or startled.


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