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.

How did digits evolve? While it is clear that they derive from genetic programs already present in fish, their precise origin remains a matter of debate. An international team led by the University of ...

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 ...

A tiny fossil fish from Alberta is forcing scientists to rethink a story that has sat quietly in textbooks for decades. It is a story about how freshwater fish rose to dominance, and how a few bones ...