Along with olive flounder(Paralichthys olivaceus), black rockfish(Sebastes schlegeli) is another very popular maricultured species in Korea. As there is many difficulties in handlling live fish for aquaculturist, use of suitable anesthesia for proper handling of fish is very important in the field. In this view, the effect of $AQUI-S^{circledR}$ has analysed for its use in the field. $AQUI-S^{circledR}$, contains 50% isoeugenol, is a new anesthics for fish and zero-withdraw time required since it was approved as a safe additives of food. In the present study, black rockfish adult exhibted sedation effect from 5 ppm at $10^{circ}C;and;15^{circ}C$, and 7.5 ppm at $20^{circ}C$, on the other hand, anesthesia was at least required 7.5 ppm at $10^{circ}C;and;15^{circ}C$, and 10 ppm at $20^{circ}C$. The fish was recovered from sedation and anesthesia after approximately 5 and 10 minutes, respectively. In case of black rockfish fry, sedation was recorded from 2.5 ppm at $20^{circ}C$, and 5 ppm at $15^{circ}C;and;20^{circ}C$. The least concentraion of anesthesia was 2.5 ppm at $10^{circ}C$, 7.5 ppm at $15^{circ}C$, and 5 ppm at $20^{circ}C$. The acute toxic test showed that black rockfish adult and nv showed mortality above 12.5 and 15 ppm concentration of $AQUI-S^{circledR}$, respectivly. In sum, $AQUI-S^{circledR}$ is considered as useful anesthetic drug for sedation and anesthesia of black rockfish, it is highly availbale to be prevented from a varity of stress.