Archived site section

Please note that the content on this page has been archived and is not actively reviewed at present.

Sustain / Good Catch / Start improving / Step 2 - Source sustainably

Marine Conservation Society ratings

Marine Conservation SocietyTrying to work out the sustainability of any particular seafood can seem like a complex issue. But the Marine Conservation Society (MCS) has assessed and rated over 150 species of fish and shellfish according to their biology, stock status, fisheries management and impact of the particular fishing or farming method used.

This information can help point you in the right direction when choosing your seafood, however, sustainability varies over time and from place to place, with differences right down to the individual boat or farm, so knowing as much as possible about your seafood supply is important. As well as looking at MCS guidance, talk with your supplier to check the details of your specific supply. You can ask your supplier to provide you with comprehensive information about the sustainability of the fish they provide to you, using the Good Catch sustainable seafood audit template.

What the MCS ratings mean

Marine Conservation Society ratings

Use the 'Advanced Search' facility on to find the MCS ratings. To search, you will need to know the species' scientific name, where it is caught or farmed and how it is caught or farmed.

Good Catch: Good Catch provides practical information for chefs, caterers and restaurateurs, making it easier for them to serve more sustainable seafood.

Sustain summit
12 Oct 2022

The summit will consider meat and dairy production and consumption in the context of the climate and nature emergency, where inspiring work and opportunities exist, and the assumptions and underlying values about meat which have shaped our policy to date.

Book now

Support our charity

Donate to enhance the health and welfare of people, animals and the planet.


The Green House
244-254 Cambridge Heath Road
London E2 9DA

020 3559 6777

Sustain advocates food and agriculture policies and practices that enhance the health and welfare of people and animals, improve the working and living environment, promote equity and enrich society and culture.

© Sustain 2022
Registered charity (no. 1018643)
Data privacy & cookies