Parrotfish

Parrotfish (named because their mouths resemble a parrot's beak) are a clade (a fundamental grouping in evolutionary biology consisting of a single common ancestor and all of its descendants) of fish placed in the subfamily Scarinae of the wrasse family (Labridae). Formerly treated as their own family (Scaridae), genetic studies found them to be deeply nested within the wrasses, and they are now treated as a subfamily (Scarinae). With roughly 95 species, the group's largest species richness is in the Indo-Pacific. They are found in coral reefs, rocky coasts, and seagrass beds, and can play a significant role in bioerosion because they eat away at the corals. This activity is also often attributed to enriching the sand content on the surrounding ocean floor.