Freshwater fish live in rivers, lakes, and ponds with low salt content, while saltwater fish come from oceans with high salinity. This difference affects everything—from tank setup and maintenance to ...

First comprehensive assessment of the world’s freshwater fish species reveals that 25% are at risk of extinction. Climate change threatens a growing number of species, from freshwater fishes to ...

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 ...