Sharks and rays have populated the world's oceans for around 450 million years, but more than a third of the species living today are severely threatened by overfishing and the loss of their habitat.

Many blacktip reef sharks in French Polynesia are commonly fed by tourists. But the low-quality diet is changing the sharks’ behavior and physiology.

In October 2023, the mangled remains of a massive white shark washed ashore in southeastern Australia. The 15-foot carcass was covered in bite wounds and stripped of its internal organs, leaving ...