Acanthopagrus schlegelii and Pagrus major, both belong to Sparidae in the order Perciformes, which are widely distributed in the West Pacific coast from Japan, Korea to the East China Sea. As the hybrid of A. schlegelii x P. major has faster growth, backcross sea bream A. schlegelii (female) and [A. schlegelii (female) and P. major (male)] (male) has heat tolerance and growth performance.