The hammerhead sharks are a group of sharks that form the family Sphyrnidae, named for the unusual and distinctive form of their heads, which are flattened and laterally extended into a cephalofoil (a T-shape or "hammer").

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Hammerheads are found worldwide, preferring life in warmer waters along coastlines and continental shelves. Unlike most sharks, some hammerhead species will congregate and swim in large schools during the day, becoming solitary hunters at night.

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The ideal diving season at Belongas Bay begins in August, with hammerhead sightings most frequent between August and November. Planning your visit during this peak period is essential, as the conditions can be quite challenging for novice divers.