Experienced aquarium owners know they should research different fish species before putting them in their tanks. Some fish are very aggressive and will fight with or eat their tank mates. Meanwhile, ...

The world has seven continents, but do you know the largest freshwater fish in each? These creatures show the incredible ...

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked ... Experts, however, stress that the rays are non-aggressive and inquisitive.

A recent study co-authored by UW professor and freshwater ecologist Julian Olden found a direct connection between the ...

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, ...

Learn More › Smallmouth bass are brutes. Pound for pound, they are one of the strongest and most aggressive fish that swim in U.S. freshwater. Their fight is one the key reasons why anglers love them ...

Oscars are an aggressive and highly intelligent freshwater fish hailing from South America, specifically the tropical Amazon River Basin and its tributaries. They go by many names, including ...