Hybrid of red seabream (Pagrus major) and Japanese red seabream (Pagrus major) grew rapidly from to August (WT 19.7℃∼24.0℃) while black seabream (Acanthopagrus major) did from September to October (WT 19.9∼23. 0℃). Survival rate of hybrids (85.5%) was a significantly higher than those of the other fish species (20%). Green liver syndrome were observed in black sea bream and Japanease red seabream but did not in hybrids. Microcotyle tai infected 0∼90% in hybrid, 20∼100% in red seabream, 10% in black sea bream and 20∼100% in Japanese red seabream but no significant difference was found among each fish species.