Oxygen consumption rate (OCR) , ammonia excretion rate and critical stifling point of Odontobutis yaluensis were measured.The results indicated that there were significant circadian rhythm of oxygen consumption rate and ammonia excretion rate of Odontobutis yaluensis.The peak OCR and the peak ammonia excretion rate of Odontobutis yaluensis (66.72±8.30 g) were (0.207 0±0.005 1) mg/ (g·h) and (0.004 0±0.001 3) mg/ (g·h) at 0:30 in (13.5±0.5) ℃, respectively.The peak OCR and the peak ammonia excretion rate of Odontobutis yaluensis (15.63±4.78 g) were (0.197 7±0.013 2) mg/ (g·h) at 0:30 and (0.008 5±0.003 1) mg/ (g·h) at 4:30 in (13.5±0.5) ℃, respectively.The peak OCR and the peak ammonia excretion rate of Odontobutis yaluensis (1.78±0.93 g) were (0.410 9±0.252 6) mg/ (g·h) at 20:30 and (0.027 9±0.006 6) mg/ (g·h) at 8:30 in (13.5±0.5) ℃, respectively.The critical stifling point of different body weight (66.72±8.30 g, 15.63±4.78 g and 1.78±0.93 g) were 0.13, 0.16 and 0.29 mg/L at (13.5±0.5) ℃, respectively.The significant negative relationship was demonstrated between the body weight and critical stifling point.A significant negative relationship was demonstrated between the body weight and the OCR and between the body weight and the ammonia excretion rate, however the temperature (0~24 ℃) and the OCR and the temperature and the ammonia excretion rate were positively correlated.