A new study shows that the ease with which these fish can develop a biological innovation (complex teeth), not just the innovation itself, enables this rapid evolution. (Photo of Nimbochromis ...

Among the fishes, there are a few options for teeth: Some fish sport "simple" conical teeth, while others sport "complex" cusped teeth. These differences allow them to survive in distinct habitats ...

Adaptations of the teeth and jaws that allow the fish to adapt to a wide range of food sources and habitats are thought to be a factor in their success. Fish, including cichlids, have either ...