Fish rank as the most diverse group of vertebrates in the world. Scientists recognize over 37,000 distinct species, with many more waiting to be discovered. Most fish fall into the ray-finned group of ...

What do iguanas, rodents, fish and wild boars have in common? They’re on a list of invasive species that federal officials are encouraging people to eat in an effort to limit damage to ecosystems. The ...

The most massive land animals in the world all eat little stuff: grass and leaves. And almost all of the most massive aquatic ...