To explore the adaptability and restoring ability in water with mutant temperature,gestated Sebastes schlegelii were moved from normal temperature(16℃) to high(25℃) or low(7℃) temperature water,being exposed for 2 h,and subsequently transferred to original seawater of 16℃.Samples were collected at 0,6,12,24,48 and 72 h during recovery to detect changes of serum cortisol(COR) and hematological and physiological parameters of gestated Sebastes schlegelii.The data showed that acute thermal stress led to parturition behavior of two fish; It was noted that COR,glucose(GLU),globulin(GLB),glutamic-pyruvic transaminase(GPT),glutamic-oxaloacetic transaminase(GOT) and white blood cell(WBC) levels in serum increased significantly(P<0.05) whereas concentrations of total protein(TP),albumin(ALB),total cholesterol(TC) and triglyceride(TG) became lower obviously during recovery process after acute stress of 25℃ and 7℃(P<0.05).Besides,there was no difference in Ca²⁺,Mg²⁺ and P contents.Interestingly,red blood cell(RBC) and hemoglobin(HGB) levels arose remarkably after acute heat stress(P<0.05) while those were detected down-regulated by acute chilling stress(P<0.05).It was observed that thermal stress had a sharper effect on physiological status compared with acute chilling stress.Moreover,most indexes,except for COR and inorganic ions,did not restore to normal level after 72 hours.Our results suggest that acute temperature stress results in distinct impact on physiological function and metabolic levels of gestated Sebastes schlegelii,and even parturition behavior in advance.It is of high importance to monitor closely water temperature fluctuation,especially elevation,as for female fish entering the reproductive phase,in order to decrease injury induced by temperature stress during pregnancy.