“Hey, four-eyes!” That playground taunt is more accurate when applied to Anableps anableps—a fish related to the guppy. It lives in the brackish waters of mangrove swamps in central and South America, ...

A "four-eyed" fish swims along the surface with eyes appearing both in and out of the water. New research explains how the fish simultaneously sees in these two very different environments. The ...

A number of anableps anableps at Living Coasts in Torquay, Devon, were seen exhibiting the unusual behaviour. Staff at the zoo, which is home to 38 of the fish, hope research will now be carried out ...