An industrial breeding experiment of sablefish (Anoplopoma fimbria) juveniles was carried out to study their growth characters. With the underground seawater temperature ranging from (10.42±0.45) ℃ to (13.65±1.22) ℃, and after 210 d of breeding experiment, the average body weight of the sablefish juveniles increased from (33.27±5.82) g to (805.20±113.79) g, with the maximum average weight gain (WG) being (193.42±29.23) g/m, average daily WG (3.68±0.61) g/d, and maximum daily WG (6.45±0.97) g/d. The relationship between body length and body weight of sablefish juveniles presented power function correlation with a general correlation equation of W = 0.0174L2.9436 (R² = 0.9731). Water temperature had influence on sablefish juveniles in terms of the WG, survival rate, FCR, and so on. The test showed that the optimal water temperature for sablefish juveniles was (11.32±0.75) ℃ to (12.68±0.92) ℃, which was almost the same as for one-year-old sablefish. Within this water temperature range, sablefish had fast growth rate, relatively low FCR and high survival rate. The study indicates that sablefish prefers low water temperature, grows fast, has high economic value, and therefore is a high-grade cold water species with promising development prospects.