So what would happen to Earth if all the fish in the ocean suddenly disappeared? NOAA, Kevin LinoI'm a scientist who studies fish, their diversity, and all the ways they contribute to ocean environments. Fish as foodFish play important roles as both predators and prey in ocean ecosystems. Related storiesIn coral reef ecosystems, small fish are eaten by larger fish and other marine animals. AdvertisementIn coral reef ecosystems, plant-eating fish control the growth of algae by constantly grazing it down.

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Persons: Fish, Kevin Lino I'm, Rogers, parrotfish, Kory Evans Organizations: Service, Fisheries, NOAA, biosciences, Rice University Locations: They're, United States, parrotfish