Market share is one indicator of increasing marketing performance of a fishery product. To support the sustainability of the production stock and market share of grouper, cultivation technology is carried out through floating net cages. This market share is usually expressed as a percentage (%), so the analysis of the market share referred to in this study is useful to find out the percentage of market potential for grouper fishing. This research was conducted for 6 months, starting in August 2017 until January 2018 which is located in Selayar Archipelago Regency. The research method used was a survey method by taking research samples namely fishermen of grouper floating net cages, collectors, local traders, wholesalers, and exporters in Selayar Archipelago Regency. The results showed that the average local market potential of grouper fish (live and dead / fresh condition) through floating net cage culture technology was IDR 27.576.045.000, greater than the export market potential of only IDR 17.166.735.000. While the market share (local and export) of live grouper fish through floating net cage culture technology is IDR 52.046.550.000 per year (58,16%) greater than the market share (local and export) of dead grouper or fresh conditions that are only IDR 37.439.010.000 per year (41,84%).