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.

The first whole genome study of mitochondrial DNA and high-resolution scans of nuclear DNA from endangered shortfin mako sharks in the Atlantic Ocean show relatively high genetic diversity, despite ...

A research expedition in the Tonga Trench filmed a Pacific sleeper shark, a slow-moving, opportunistic predator rarely seen ...