These were suspended from the peritoneal wall and joined together posteriorly at the genital pore. There were covered by a thick muscular tructure. In contrast with previous study of sexual maturation for hybrid brown trout (Salmo trutta) x brook trout (Salvelinus fontinalis) [23] the gonads that were found were underdeveloped and deformed. For TGGG hybrid grouper, for the anatomical features, the gonads follow a normal course of development that resembles their parent fish.