 Although the herbivores primarily feed on plant material, these species often have omnivorous tendencies.The carnivores include specialized fish-eaters (genus "Mesoborus"), fin-eaters ("Belonophago", "Eugnathichthys" and "Phago") and species that will feed on both whole fish and fins ("Ichthyborus").The fin-eaters attack other fish, even ones that are much larger, where they bite off pierces of fins with their sharp teeth.