This paper presents an initial study on the potential of the utilization of floating PV system for Seribu Island sea waters. Seribu Islands is an area consisting of many islands and there are many coral reefs and algae. From several existing studies, the condition of coral reefs and the algae, particularly the Zooxanthellae are quite alarming. This is not only because of human actions, but also because of the water’s condition such as water temperature, salinity and pH. Additionally, the incoming light is also influence the growth of the algae. This paper, therfore, focus on study the sea condition particularly the condition of the corall reefs and the zooxanthallae and an initial plan of the floating PV system application.