Learn how fish in the Democratic Republic of the Congo scale a near-vertical waterfall using microscopic hooks.

Freshwater trout migrations typically span just a few hundred yards and tens of miles. They’re not covering the distance that their anadromous relatives do, but they, too, will seek out new water for ...

Climate change is reshaping fish habitats. Some fish are winners, others are losing out. Subscribe to our newsletter for the latest sci-tech news updates. Fish already face plenty of pressure from ...

When you think about climate change in our oceans, you may picture coral bleaching, melting sea ice, or extreme weather events. But beneath the ocean's surface, another quiet shift is underway.