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¹ University of Guilan, Faculty of Natural Resources, Department of Fisheries, Sowmeh Sara, Iran
² Khoramshahr Marine Science and Technology University, Department of Fisheries Khoramshahr, Iran DOI : 10.4194/2618-6381-v19_1_08 Viewed : 3711 - Downloaded : 3024 A study was conducted to determine the cause of mortalities in juvenile sobaity seabream, Sparidentex hasta (Valenciennes, 1830) cultured in a commercial fish farm hatchery located at Suza, southeast of Qeshm (Iran). Anorexia, anoxia, and excess mucous secretion were the main sympotoms observed in moribund fishes. Microscopic examination of the gill filaments revealed the presence of the trophonts of the causative agent, Amyloodinium ocellatum (E. Brown) E. Brown & Hovasse, 1946. This is the first report of A. ocellatum infestation in sobaity seabream cultured at marine fish hatcheries in Iran. Keywords : Amyloodiniosis, Dinoflagellate, Fish parasite, Mariculture, Mortality