The Turkish Island of Gokceada is located in the northeastern Aegean Sea. In this preliminary study, six collecting stations, at depths 5-15 were sampled. A total of 76 species were collected by trammel and gill nets (59 species) or by trawls (17 species). lit each station and during each season the Shannon-Weaver Diversity index and Simpson Dominance index were calculated. These indices were compared with their mean values for each station. The similarity among the stations was estimated Sorenson's (1948) formula. Similarity index, stations I and III showed the highest similarity (80%), and stations IV-VI (44%) and V-VI (45%) showed the lowest similarity.