The original species of Astronotus ocellatus is native to the Amazon River basin ... are timid when they're first introduced to a new aquarium. After they've had a few days to adjust, however ...

If you are planning a visit to the aquarium or are wondering what makes ... “widely distributed throughout the Amazon River basin,” according to Amazon Aid — a Virginia-based nonprofit ...

Smaller fish species are more nutritious, lower in mercury and less susceptible to overfishing, a Cornell-led research team has found. The team's study was conducted in the Amazon River, but the ...