Freshwater ecosystems across the United States are absorbing the consequences of decades-old decisions to import large non-native species for aquaculture, pest control, and the pet trade. From black ...

In rivers that once held a balanced mix of native fish, a giant predator now dominates so completely that it has started lunging out of the water to grab unsuspecting pigeons. The wels catfish, a ...

A dead fish is a dead fish.” That’s the key finding of a recent study on the scavenging habits of our native crayfish, led by ...

Nearly one in three freshwater fish species now faces possible extinction, a statistic that reflects mounting pressure on ...

Fish that live in rivers, ditches, and streams are better able to withstand warming water than fish in the sea. This is the ...