Fish anesthetized with either Quinaldine sulfate or Quinaldine maintain a response to pressure that dissipates
after approximately 20 seconds of contact. In addition, their analgesic qualities are questionable making them a poor
choice for most surgical procedures. Quinaldine doses range from 5-12 mg/L in salmonids, and 2.5-30 mg/L or higher for
warm water fish. Tilapia are insensitive to the effects of Quinaldine requiring concentrations of 50-1000 mg/L to
reach an appropriate plane of anesthesia (Summerfelt and Smith 1990).