Fish

Researchers have found PFAS in the bodies of wild animals everywhere they’ve looked. Now they’re beginning to understand the health effects.

A bounty of much-needed new federal funds will help reconnect habit for freshwater and terrestrial animals.

To anticipate the impacts of a historic river restoration, we need to understand how salmon, bats, insects, algae and other parts of the ecosystem are behaving today.

Experts say new international trade restrictions will help, but they leave several problems unsolved.

This year we bid farewell to two lost frogs, the Chinese paddlefish, a plant from New Hampshire, and many others.

A growing movement across the continent is working to remove thousands of barriers and restore some of the world’s most fragmented rivers.

Human activities have imperiled our waterways — along with almost one-third of freshwater fish and many other aquatic species.

Lost in much of the coverage of the region’s water woes is the ecological crisis caused by prolonged drought, climate warming and development.

An upcoming project would change the flow of the Mississippi River and its sediment to make up for land the coast is losing due to climate change and sea-level rise.

Addressing environmental threats in Antarctica could help spur global action, an expert says.