Freshwater fish live in lakes, rivers, ponds and streams. Common freshwater fish include carp, bass, trout and catfish.
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The snakehead fish can breathe air, double its population in 15 months and has a huge appetite, which is not a good thing for native species.
The prehistoric looking alligator gar is sometimes referred to as a "living fossil" and, while they may look threatening, are harmless to anything larger than themselves.
Scientists have long known that much of the world's farmed salmon was deaf. Now they know why.
By Alia Hoyt
Maybe the shark in 'Jaws' really did have a personal vendetta after all. Scientists have found at least one species of fish that can distinguish between human faces.
A new study looks into the impact trace amounts of antidepressants in water has on the behavior of Siamese fighting fish.
Kite fishing is a new, creative and complicated way to fish. Once you get the hang of it, you can haul in a large amount of fish at one time.
It's possible to keep seafood--a valuable source of protein and Omega-3 fatty acids-- in your diet without doing too much harm to the oceans, if you're careful about what varieties of fish you buy and who you buy it from.
Contrary to popular belief, freshwater sawfish are not sharks. These fish are from the ray species and can grow up to 20 feet (6 meters) in length.