Male cichlids have a strict ... and placed six females and two males in each experimental compartment, allowing each group of fish to interact freely and to visually interact with the neighboring ...

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, ...

The cichlid fish of Africa's Great Lakes have formed new species more rapidly than any other group of vertebrates. A new study shows that the ease with which these fish can develop a biological ...