The urinary system is consisted of kidney,ureter and bladder in Triplophysa bleekeri.The head kidney is small in size.The kidney includes renal corpuscle,renal tubules and lymphoid tissue,and there is no differentiation between cortex and medulla.Morphologically,the renal tubule was differentiated into distinct segments:first and second proximal tubules and distal tubule,without cervical segment.There is evident difference in ureter’s organizational structure between forepart and rear-end.The bladder is in undeveloped tubular form.Two Stanniuse corpuscles are observed.