Name the type of fish that eat plants only?

The type of fish that eat plants only is called herbivorous fish. They are found in both freshwater and saltwater environments and consume a variety of plant matter, including algae, seaweed, and other aquatic plants. Some examples of herbivorous fish include:

1. Surgeonfish: These brightly colored fish are found in tropical and subtropical waters and feed on algae and other plant material.

2. Parrotfish: Parrotfish have distinctive beaks and strong teeth that they use to scrape algae from coral reefs and rocks.

3. Rabbitfish: Rabbitfish, also known as grazers, feed on algae and seaweed and play a vital role in maintaining coral reef ecosystems.

4. Tangs: Tangs are herbivorous fish that are popular in the aquarium trade. They feed on algae and other plant matter.

5. Plecos: Plecos are freshwater catfish that are known for their ability to consume large amounts of algae. They are often kept in aquariums as algae cleaners.

6. Mollies: Mollies are livebearing freshwater fish that feed on algae, plants, and other small organisms.

7. Goldfish: Goldfish are omnivorous but primarily consume plant matter, including algae, plants, and fish flakes.

8. Guppies: Guppies are livebearing freshwater fish that are known for their bright colors. They feed on algae and other plant matter.

These are just a few examples of herbivorous fish, and many other species exist in diverse aquatic ecosystems around the world.