Levels of pharmaceuticals considered unsafe for aquatic organisms were found at more than one-quarter of sampling sites.

Researchers find that the protective outer layer that lungfish make to survive extended dry periods—once thought to be a simple mucus shell—contains immune cells that trap bacteria and protect the animals from infection.

Plants use two different strategies to photosynthesize underwater.

Populations of the two-foot-long amphibians are declining across North America. Scientists are struggling to find out why, before it’s too late.

The fish’s undiscerning palate might make more of the lake habitable to the species than once thought, according to a new study.

Sea snakes wait in thirst for “lenses” of freshwater forming on the surface of the ocean after a heavy rain.

Freshwater fish suffer from low levels of oxygen in the country’s rivers, while bats are unable to survive the extreme air temperatures.

The shotgun approach, typically thought to be the superior method, may substantially underestimate diversity in environments that have not already been classified, researchers find.

When road deicing salt enters freshwater ecosystems, prey species such as Daphnia pulex can rapidly evolve tolerance to the contaminant, buffering their local food webs from the impacts of salination.

The increasing global demand for potable water needs immediate attention—from researchers and policy makers alike.

A new report estimates that human activities as well as other factors are threatening 20 percent of all invertebrate species, including corals and freshwater snails.

A unique resource for studying environmental impacts on freshwater systems is threatened by federal funding cuts.