Hand of an adult for size comparison. Left: Otodus megalodon; First row f.l.t.r. Palaeocarcharodon orientalis, Galeocerdo aduncus, Myliobatidae indet., Upper and lower tooth Notorhynchus ...

In line with the IUCN report, the study found steep declines in shark and ray species that play a critical ecological role, such as rhino rays, devil rays (genus Mobula), eagle rays (family ...

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 ...