This study was carried out to evaluate off-shore water quality and to draw marine pollution map to Southern sea in Korea by bioassay using gametes and early development system of Asterias amurensis. From the bioassay, it was determined that the water qualites of Southern sea maintained the grade Ⅱ, because development of A. amurensis were moderately inhibited. However, Sunchon, Kwangyang, and Jinhae Bay belonged to grade Ⅲ, because development of A. amurensis were strongly inhibited. This could be due to the inflows of several river systems and poor water circulation.
The water quality at Yosu island was the grade I, because A. amurensis were not inhibited in its early development.

• 유춘만(전남대학교 생물학과) | Chun Man Yu
• 박지인(한국수자원공사) | Ji In Park
• 조기안(초당대학교 환경공학과) | Ki An Cho
• 주현수(서남대학교 생물학과) | Hyun Soo Joo
• 박종천(서남대학교 생물학과) | Jong Cheon Park
• 나명석(전남대학교 생물학과) | Myung Suk Ra