CHAPTER I INTRODUCTION The Gulf of Mexico Reef Fish Fishery is one of the oldest (Carpenter, 1965) and most important of the Gulf fisheries in terms of both quantity landed and total dockside value. The fishery encompasses a wide variety of fishes, including 15 species of snappers, 15 species of groupers and 3 species of sea basses. Although the above species constitute the management unit as defined by the Gulf of Mexico Fishery Management Council (GMFMC, 1979), several additional species of fish are taken incidentally. These incidental species include several species each of tilefishes, jacks, tiggerfishes, wrasses, grunts, porgies and sand perches (Appendix A). In spite of the sizable number and variety of species taken, three species, red snapper (Lutjanus campechanus), red grouper (Epinephelus morio) and black grouper (Mycteroperca bonaci), are the most desired species and hence the most abundant in commercial catches (Moe, 1963). All of the Gulf Coastal States participate in the reef fishery with fishing activity widely dispersed throughout the Gulf of Mexico. The Gulf of Mexico Reef Fish Fishery (GMRFF) is the primary domes- tic producer of reef fish, accounting annually for an average of 93 percent of total domestic catch. Total landings (U.S. NMFS, 1979) in 1The Gulf Coastal States include Florida West Coast, Alabama, Mississippi, Louisiana and Texas.