Video S1 Midnight parrotfish (Sc. coelestinus) scraping the epilithic algal matrix (EAM).
Video S2 Initial phase stoplight parrotfish (Sp. viride) excavating the reef matrix while feeding on the epilithic algal matrix (EAM) and endolithic algae. Notice the deep grazing scars that result from the powerful bites.
Video S3 Terminal phase queen parrotfish (Sc. vetula) scraping the epilithic algal matrix (EAM).
Video S4 Initial phase yellowtail parrotfish (Sp. rubripinne) tearing algae from the epilithic algal matrix (EAM). Note that the scraping sounds that can be heard in the video are from scraping and excavating species feeding nearby but out of the video frame.