Yoswaty, Dessy2016-04-042016-04-042016-04-04978-602-17943-2-6wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/8165Mackerel fish (Cybium commersoni) is one of the foodstuffs consumed by many people and contain high nutritional value, especially protein. Monitoring of marine water quality in coastal waters of Bengkalis to achieve sustainable management of marine tourism can be conducted bacteriological and protect fishery production that cause disease in humans. C. perfringens in mackerel (Cybium commersoni) allegedly increased the amount of pollution caused by domestic wastewater (sewage), anthropogenic activities and rapid development along the coastal waters of Bengkalis. Research objectives were to analyze C. Perfringens in mackerel (Cybium commersoni) as bioindicator of pollution so as to ensure the health and comfort of the local community and tourists. The research method is a survey method, using the media to TSC (Tryptose Sulphite Cycloserine). Mackerel samples obtained from Bengkalis waters, the study in March-April 2012, the data analysis of the total C. Perfringens by West (1989) and Fardiaz (1992). Observations of total C. perfringens on mackerel ranged between 3.1 x 104 to 6.0 x 106 cells/gram sample. Distribution of C. perfringens highest found in gills, compared to the digestive tract and mackerel meat. The results of the identification of bacterial isolates C. perfringen on mackerel fish are Gram-positive cells, stem shape, black in color, in-methyl, colonies, turned cloudy and gas bubbles are formed. C. perfringens on mackerel can grow at 37 oC. C. perfringens in fish mackerel are still below the threshold that could be categorized Bengkalis coastal waters has not been contaminated. Management of marine tourism in coastal waters of Bengkalis can be developed to improve public health and tourists, including protecting coastal ecosystems of Bengkalis.enperfringensmackerelmanagement of marine tourismUR-Proceedings