Crocodiles which roamed the world's seas millions of years ago developed in similar ways to their modern-day relatives, a study has shown.
Fresh research into a group of prehistoric marine crocs known as Machimosaurus reveals key details of how and where they lived.
Each species adapted features that enabled them to live and hunt in a range of habitats, just like modern-day crocodiles. They varied in body length, body skeleton, skull and lower jaw shape, and in their teeth.