Great hammerhead sharks breed infrequently, about once every two years. And the rate at which people catch and kill the sharks — both accidentally and intentionally — contributed to the International Union for the Conservation of Nature listing the species as critically endangered in 2019. So when nursery areas are discovered, “it’s important they remain safe,” says marine biologist Jasmin Graham, president and chief executive of Minorities in Shark Sciences, an organization that promotes diversity and inclusion in marine science. And while adult sharks have few predators other than people, “there’s a super high mortality rate for juveniles.”

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