Aquaculture

Aquaculture Fish Anaesthesia Welfare Standards

Fish anaesthesia is used in aquaculture for handling, sampling and transport, and appropriate anaesthetic protocols prevent unnecessary stress and pain.

Key Facts

MS-222 (tricaine methanesulphonate) is the most commonly used fish anaesthetic in research and aquaculture
Clove oil (isoeugenol) is used as a more accessible alternative in some farm applications
Incorrect dosing causes prolonged induction or fatal overdose
Recovery in well-oxygenated water is essential and must be monitored
EU and UK regulations require veterinary oversight for anaesthetic use in food fish

Welfare Considerations

Fish anaesthesia reduces handling stress but requires correct dosing and monitoring to prevent harm. Standardised anaesthetic protocols based on species and weight are essential welfare practice.

What You Can Do

Support aquaculture welfare certification that includes anaesthesia protocol standards
Advocate for veterinary oversight requirements for fish anaesthetic use in commercial aquaculture
Ask producers about their anaesthesia protocols for handling and health sampling procedures