Largetooth flounder(Pseudorhombus arsius) belongs to the genus Pseudorhombus of the family Paralichthyidae. In Taiwan, it is mainly distributed in the west, north, and Penghu waters. It belongs to tropical and warm temperate bottom sea fish. After 110 and 111 years of original collection and breeding experiments of flatfish species, it was found after screening that the species has a high survival rate and a maximum size of 45 cm, which has high economic value. Therefore, this project will carry out the research of flounder, establish and promote the complete breeding technology, and in the future, it will also be used in the cultivation of photoelectric facilities to increase the diversity and market competitiveness of aquaculture species.