* They eat algae: Parrotfish primarily feed on algae, which are producers. This makes them herbivores.
* Primary consumers in the food chain: Primary consumers are those organisms that feed directly on producers. Since parrotfish eat algae, they fit this definition.
Important Note: While parrotfish are primarily herbivores, some species do consume small invertebrates. However, their diet is dominated by algae, making them primary consumers in most cases.