Fish

U.S. states hope to tap Canada’s network of large dams to meet low-carbon goals, but do better options exist closer to home?

Smalltail shark populations have declined by 90% in Brazil, and new research finds that overfishing has pushed the species perilously close to extinction.

After a half-century of failures, the recovery of the Connecticut River ecosystem hangs in the balance. Will authorities finally act to save it?

Solving this biodiversity mystery could reveal one of the most important sites to conserve these “rhinos of the sea.”

Subsistence, artisanal and small-scale fisheries represent a previously unrecognized threat to many protected shark and ray species.

A collection of our best articles and essays about some the world’s most at-risk groups of species — and what we can learn from them.

More frequent, longer-lasting blooms can harm both wildlife and human health — and even kill. Can we learn to predict and prevent them?

A river-restoration advocate looks back at her family’s forgotten history to gain new insight into the history — and future — of our country’s rivers.

A new report concludes U.S. waters “have insufficient protections for a healthy future,” and that the problem has gotten worse under the Trump administration.

You may not have heard much about the long fight to remove the Nooksack Dam near Bellingham, Washington, but its detonation this week will prove ecologically and culturally important.