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Goatfishes from the family Mullidae are regarded as key species in the coastal biotopes due to their special feeding behavior: sediments are mixed by means of a pair of barbels located on the chin of the fish that attracts other fishes to form foraging aggregations. In fishes, the reproductive system is sensitive to environmental changes. Anomalies in ovarian structure were studied in three widely distributed goatfish species (Parupeneus multifasciatus, Upeneus tragula, and U. margarethae) from Nha Trang Bay (southern Central Vietnam). The fishes were collected in the buffer zone of the Marine Protected Area.