What are two major primary consumers that are herbivores in the pacific ocean?

Two major primary consumers that are herbivores in the Pacific Ocean are sea urchins and some species of fish, such as parrotfish. Sea urchins feed on algae and play a crucial role in maintaining the balance of marine ecosystems. Parrotfish, with their beak-like teeth, graze on algae growing on coral reefs, helping to prevent algal overgrowth and promote coral health. Both contribute significantly to the energy flow in their respective marine environments.