The present invention is the compound amphiploid aquatic animals with xenogenesis genome AB, and sex chromosome is the XXXY type with reproductive capacity. Male non reduction sperm and female non reduction ovum are filtered out from the most F1heterosis aquatic animals accommodated in closed system, allows non reduction ovum and non reduction sperm fertilization, to cultivate the compound amphiploid aquatic animals of the XXXY type sex chromosome with reproductive capacity. There is XXXY type sex chromosome by what, so can be with the ovum AX for the Hybrids F1 for generating non reduction ovumBXMating, through natural mating, can stablize the compound amphiploid for cultivating Hou generation. When carrying out meiosis, each group of chromosome of the same race can all distribute really, therefore can permanently maintain the property of the first generation (F1). There is no heredity separation by what, therefore the genome of xenogenesis is bound to every two groups distribute, even if repetitiousness inbred, will not show the weak tendency of inbred.本發明為具有異種染色體組AB的複合雙倍體水棲動物，其性染色體為具有繁殖力的XXXY型。從封閉系統中收容的多數雜種第一代水棲動物中篩選出雄性非減數精子和雌性非減數卵，讓非減數卵和非減數精子受精，以培育出具有繁殖力的XXXY型性染色體之複合雙倍體水棲動物。由於具有XXXY型性染色體，所以可和產生非減數卵的雜種F1之卵AXBX交配，透過自然交配，可穩定培育出後代的複合雙倍體。進行減數分裂時，每一組同種的染色體都會確實分配，故可永久維持第一代(F1)的性質。由於沒有遺傳性分離，故異種的染色體組一定會每二組做分配，即使反覆近親交配，也不會顯現出近親交配的弱勢。
