Up to now there are 621 species, 305 genera belonging to 108 families have been found in the coastal wesstern areas of the Rac Ro Gulf Among of them, there are some families of fishes have been found in rather high number of species such as Gobiidae 48 sps. Serranidae 31 sps. Carangidae 27 sps ect. The fish fauna have been structured by 3 groups: 337 species of demersal fishes (occupied 54,26 percent of the total number), 90 species of pelagic fishes (14,49 percent) and 194 species of coral fishes (31, percent).