TED-Ed
TED-Ed: The fish that walk on land | Noah R. Bressman
We think of fish as completely aquatic animals. But there are actually hundreds of fish species that are amphibious, meaning that they possess adaptations that enable them to survive on land. Once on land, however, they face suffocation,...
Miami University
Ohio State University: The Evolution of Sharks
Extensive text-based evolutionary history of sharks. Windows Media Player required to view the short movie which pictures an example of a modern shark.