Fish are water-dwelling vertebrates. These aquatic animals breathe by absorbing oxygen from the water using gills. Almost all fish are cold-blooded, and some have scales to protect their bodies. Most species lay eggs—in fact, certain species are able to lay millions of eggs at a time.
Some fish prefer saltwater or freshwater, while others have the ability to survive in both. Common threats to fish in and around the United States include overfishing, habitat degradation, and poor water conditions. Climate change is also a threat, particularly for coldwater fish, which are extremely sensitive to changes in water temperature. When streams get too warm, the fish can experience slower growth rates, lower oxygen levels in the water, and greater susceptibility to poisons, parasites, and disease.
The crisis isn't just a global problem—we're facing it in our own backyards. Meet some of the species that are already seeing an impact.Read More
The unprecedented threats facing wildlife must be a clarion call to action, the National Wildlife Federation says following the release of a new report from the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services.Read More
What's on deck with the National Wildlife Federation? Check out our scheduled events—we just might be coming to a city near you!See Events
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More than one-third of U.S. fish and wildlife species are at risk of extinction in the coming decades. We're on the ground in seven regions across the country, collaborating with 51 state and territory affiliates to reverse the crisis and ensure wildlife thrive.