Korean temperate sea bass was examined for the taxonomically review. Based on the color pattern on the body sides and some morphometric characters, it was classified as two species, Lateolabrax japonicus and Lateolabrax sp.. Lateolabrax japonicus was redescribed and Lateolabrax sp. was provisionally described. Lateolabrax sp. is similar to L. japonicus, but differs from it by having some black spots on the body sides, fewer number of gill rakers, larger eye, higher position of the pored lateral line scales, and wider secondary body depth.