This paper presents contributions to the biology of Sebastes inermis Cuvier et Valencinnes. For the age-determination can be used the scale and otolith, and the similarity of mark-size was proved. The relationships of total length (L) to scale-size (R) and also to otolith-size (R) were linear, and mark-sizes were standardized by L-R equations. The marks are formed periodically on the scale in September, while on the otolith in April. The growth was fitted by the Putter-Bertalanff's equation to length data, Buch-Andresen-Fischer's equation to weight data. This ovoviviparou s fish copulates in November, and the egg-fertilization and progeny-production occur from December to January. The fish produces the progenies at one time. The sexual maturation is first attained at 2-age and the main spawning group is the 3 age group. The number of progenies is proportional to 5.56 power of female total length.
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