Unlike nearly every other species of shark, scalloped hammerheads are highly social. They gather in large groups, or aggregations, numbering in the hundreds. But why? We don't know.
Scalloped hammerheads—one of ten species in the hammerhead family—prefer warm waters. But they have become regular visitors to the waters off Perth in summer, now the, able to hunt in the dark waters 500 meters below the surface. They grow slowly and live for up to 55 years.They're a challenging species to study because they cover long distances and spend lots of time down deep.
In terms of what were they doing, our study suggest they're seeking a place to rest and recover. Sharks often hunt more on the nights with a full moon, taking advantage of better light to see prey. We need to strengthen protections in the marine park, shifting from multiple use status—which allows fishing—to highly protected, which prohibits fishing.
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