Cobia (Rachycentron canadum) is newly developed fish in Indonesia with an export value, however, the production activities of this fish continue to decrease due to fish massive mortality caused by disease. This study aimed to determine the predilection, prevalence, and intensity of Neobenedenia girellae infestation on cobia in floating net cages culture at Hurun Bay, Lampung. The sampling method used in this study was the purposive sampling method. Fish samples were taken at 20-30 cm as much as 50 fish, while 40-50 cm as much as 20 fish. Neobenedenia girellae were found on cobia eyes, head, and fins. Results showed the prevalence level in 20-30 cm fish was 30% and intensity level was 2.31 parasites/fish, while in 40-50 cm fish showed the prevalence level of 65% with the intensity of 1.47 parasites/fish.