The tiny Amazon molly (Poecilia formosa) has always fascinated researchers because, according to the rules of evolution, it ...

Older than dinosaurs, these 8 ancient fish existed millions of years earlier and some still survive today in oceans, rivers ...

Freshwater fish species have an uphill battle for survival, especially with a changing ecosystem. “So, we’re trying to see ...

If you liked this story, share it with other people. The new fish species come from five continents and a diversity of habitats, including limestone caves, peat swamps, wetlands and rivers. Most are ...

Reef fish in different oceans often develop similar color patterns because evolution explores the same set of biological ...