Since little ecological information of black rockfish Sebastes inermis has been given so far , the study on their age, growth, condition factor and so on in the southern coastal waters of the Harima Sea was carried out. Growth formulae estimated from annuli in otoliths indicated that the growth of females tended to be slightly inferior to that of males . Seasonal fluctuation of the condition factor of males and females both showed very similar patterns like periodic functions , that is, the condition factor took low level from January to May, and it took high level from June to September . This phenomenon was closely related to the fact that the black rockfish were required much nutrition to their gonads in their maturative period from November to January . From age composition of the black rockfish in this study, it was detected that catching rate of 4 age fish was more than that of 3 age fish. This phenomenon was presumed to be the effect of great number of release of Korean black rockfish in 1986 . 水産上重要 な魚種で あるに もか かわ らず,生 態学 的 な知 見 に乏 しいメバ ル,Sebastesineymisに つ い て, 前報1)で は食 性と成熟 に関す る報告 を行 なった。 今回 はその続報 と して,年 齢 と成長,お よび肥満度 な どに関す る報告 を行な うこととし,合 わせて漁獲魚 の年齢組成 より,そ の資源構造について も若干の考察 を加 えた。