A variety of fish species have proven instrumental in the investigation of evolution, behavior, ecology, and physiology, among many other fields. Many model systems (e.g., zebrafish, guppies, and ...

An “iridescent” catfish torpedoed through a rushing blackwater river in Brazil, navigating dead leaves and wood. Little did it know it was soon to be discovered as a new species. Once the “large” fish ...

A new species of catfish was discovered from a river in Brazil, according to researchers. Photo shows a representative area of a river. Photo by Felipe Dias on Unsplash An “iridescent” catfish ...