Many fish species are recommended for new aquarists setting up an aquarium. The fish listed here generally get along well with others and can tolerate a range of water quality parameters. Before ...

The Numbers Tell An Incredible Story The Amazon basin houses over three million species in its rainforest ecosystem, with ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Thousands of fish ...

Researchers discovered a new species dwelling at the bottom of a river in the Amazon rainforest, according to a new study. Image from the Journal of Fish Biology A rare new species of fish was ...

Top-dwelling fish are a great addition to any tank. Not only do they add vibrancy and diversity, but they may be necessary if you keep aggressive bottom-dwellers, like crayfish or crabs. In this guide ...

The pirarucu, the giant fish of the Amazon, was an endangered species. Due to conservation efforts, it's making a comeback. Now a big fish story - seriously. In the Amazon jungle, there is a species ...