MSC is an international certificate for sustainably caught wild fish from the Marine Stewardship Council, an international independent organization to protect marine life. Products with the MSC quality mark are guaranteed traceable to sustainable fisheries that meet the MSC fishing standard. This means that 1. there is no overfishing on fish stocks (fishing pressure and biomass are healthy) 2. there is respect for other marine life (such as birds, mammals, sensitive areas) and 3. good management takes place (catch agreements, compliance, check).

ASC is a certificate for farmed fish, crustaceans and shellfish. It sets requirements in areas such as antibiotic use, responsible fish feed, protection of local biodiversity and ecosystems, greenhouse gas emissions, waste management and use of chemicals. It also oversees working conditions and dealing with local communities. The requirements that ASC sets for the growth of farmed fish - water quality, animal health and living space - have a positive effect on animal welfare. There are no animal welfare requirements for slaughter.