There are several recognised codes and standards promoting welfare in aquaculture and wild fisheries. The most prominent are the World Organisation for Animal Health (OIE) and the RSPCA welfare standard. These codes give information on welfare requirements for husbandry practices, environmental quality, feeding, health management, grading, vaccination, transport, slaughter/killing and crowding. In all cases, the standards are based on scientific, veterinary and practical industry expertise. The welfare of other aquatic animals such as wild fish and crustacea are also covered in other more specific codes.
You can explore the various welfare regulations and codes in the following links:
Slaughter of Wild Fish and Crustaceans