Abudefduf
The approximately 20 species of Abudefduf may be divided into planktivores (plankton eaters) and benthivores (shellfish eaters)  and three broadly tropical living clades (groups). Two of the Abudefduf clades are primarily benthivorous and a third clade is composed of planktivores and is the most species-rich. Most diversification (dfferent classes) has occurred in the last 10 million years within this genus across all clades.