AQUI-S, A New Anesthetic for Use in Fish Propagation

Abstract

AQUI-S is a new fish anesthetic approved for use in several countries and until recently was being developed in the USA as a sedative for immediate release of fish after sedation. Many hatcheries and research studies use AQUI-S to immobilize fish for rested harvesting and to suppress sensory systems during invasive procedures. AQUI-S still has the potential to be approved as an anesthetic with a short withdrawal time. Within, we briefly describe many aspects of AQUI-S including the legal uses for it, anesthesia mechanism, harvesting and what is currently known about, behavioral, pathologic effects of the anesthetic. We outline methods and precautions for administration and changes in fish behavior and discuss the physiological effects of anesthetic, its potential for compromising fish health and effectiveness of water quality parameters.