A trove of fossils in China, unearthed in rock dating back some 436 million years, have revealed for the first time that the mysterious galeaspids, a jawless freshwater fish, possessed paired fins.

The image on the left shows the fin bones of a wild type medaka fish. The image on the right is a medaka with the gli3 gene knocked out. The knockout fish has extra proximal radial bones (labeled pr ...

Fish have been around since the dawn of complex animals. They were the first vertebrates, had the first live births and were the first four-limbed animals to venture onto land. The fossil fish ...

Add Yahoo as a preferred source to see more of our stories on Google. A 67-million-year-old fish fossil preserved rare middle ear bones that amplify sound. New analyses suggest otophysan fish evolved ...