<p><b>Fig 1.</b> Parrotfish help cycle matter by expelling fine-grain coral sand on a tropical reef at Palmyra Atoll. Palmyra Atoll is in the center of the Pacific ocean basin.</p>

Fig 1. Parrotfish help cycle matter by expelling fine-grain coral sand on a tropical reef at Palmyra Atoll. Palmyra Atoll is in the center of the Pacific ocean basin.

Image by Ingrid Knapp