The specific richness, frequency, evenness and diversity were analyzed at four sites. Seasonal changes and differences among the sites studied were also analyzed. A total of 76 species was registered. Five species were the most abundant in most of the zones and during the greater part of the study: Stegastes spp., Thalassoma lucasanum, Abudefduf troschelii, Chromis atrilobata and Haemulon maculicauda. Differences were found in the structure of the communities between different seasons and between study sites; however, the diversity values had no significant differences. A positive relationship was found between specific richness and temperature.