Which food is consumed by herbivorous type of fish?

These are the fishes which are complete vegetarians by nature. Plecos, Silver dollars, Pacus are some of the fishes which are herbivores and can be raised in the aquarium. These depend on the flake foods and also the algae, which is present in water. You can also provide these fishes with fresh lettuce, spinach, green peas. The green peas should be made into the size of the flakes or pellets for easy swallowing so that it does not cause constipation issues in the fish.