Fish used in research require humane handling and appropriate anesthesia for procedures. Evidence-based anesthesia protocols minimize pain and stress during interventions while improving research outcomes.
Fish welfare in research settings has improved significantly as the scientific and regulatory community has recognized fish sentience. Appropriate anesthesia is now standard practice for many procedures, and research protocols that minimize handling, reduce time out of water, and use validated recovery monitoring represent genuine welfare advances. The remaining gaps include inconsistent implementation across facilities and jurisdictions, and continuing use of methods like clove oil at concentrations that may not be reliably effective. Fish welfare in research is an area where clear guidelines, consistent implementation, and institutional culture all matter.