At the base of the Grand Teton Mountain range, a new fish species tinged with green was identified as separate from its blue brethren.

Here are our favorite types of freshwater fish you can keep as a pet. If you're in the throes of setting up a home aquarium, ...

Louisiana has become home to numerous invasive species, some of them wreaking havoc on the state's environment. Here are the ...

A new study reveals significant changes in the global freshwater oxygen cycle. Rivers, streams, lakes, and reservoirs aren’t ...

They're billed as one of the most abundant migratory fish species in the Great Lakes.Every year, suckers make their way up ...

Do you think that a saltwater tank is vital for keeping stunning, exotic fish? Reevaluate that idea. Freshwater aquariums are ...

A string of attacks on tourists from piranha-like fish with sharp teeth has forced a popular holiday resort to close.