The Pompano (Trachinotus ovatus) in the traditional classification divides into Trachinotus ovatus (short fin) and Trachinotus blochii (long fin). In 1989, Taiwan started to gather raises the Pompano, the fry mainly fishing for north sea area. pond culture for many years, discovered that the Trachinotus ovatus growth was quick and cold resistant. This study has three major terms: First, established the platform to recognize the Trachinotus ovatus (short fin) and Trachinotus blochii (long fin) by Taxonomy and gene identifying skills. Second, reproduction glandular histological, compared the germ cells maturity difference with Cultivation and Net Cage. Third, investigation environment and the hydrological data take the appraisal target. The experimental result showed that both Trachinotus ovatus and Trachinotus blochii spine number are 23, and the dorsal hard fin number Trachinotus blochii is 5, Trachinotus ovatus is 6. Moreover, a apparent characteristic is the Trachinotus blochii first soft dorsal fin is longer than Trachinotus ovatus, the expression may by the shape characteristic obvious resolution difference。 To design Cytochrome b gene degeneration primer for Trachinotus ovatus (short fin) and Trachinotus blochii (long fin). Successful to sequence for 370 bp region of the mitochondrial cytochrome oxidase subunit I gene. 4 age Pompano breed in Cultivation and Net Cage, reproduction glandular tissue discovered that the cell growth in perinucleolus stage, the germ cells has not reached maturely.