Salzburg’s cichlids can reach about 2 inches long in the wild but “tend to grow much larger in captivity,” the study said. They have “large” heads, “large” mouths and “widely ...

Nature is fascinating and here’s proof of it. These 10 animals defy norms by giving birth through their mouths ...

It's not what you do, it's how readily you do it. Rapid evolutionary change might have more to do with how easily a key innovation can be gained or lost rather than with the innovation itself, ...

Correct choices were rewarded with a food pellet. Three of the eight stingrays and six cichlids successfully learned to complete this task. After the fish were successfully trained, the researchers ...