Good Fish Guide
Your guide to sustainable seafood
You can play a key role in securing the future of our seas and marine wildlife by making more environmentally responsible choices when buying seafood.
Make the right choice and reduce your impact - every purchase matters!
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Crayfish or crawfish
Crayfish are eaten worldwide. Most are supplied from aquaculture. The major producers are China and the USA and the main species is the Red Swamp crayfish (Procambarus clarkii), which is native to the USA and has been introduced throughout
much of the world.
Red Swamp crayfish are farmed in both the US Southern States and China. Both countries farm them in agricultural ponds or rice paddies and their production does not require the use of feed or chemical inputs. In China escaped crayfish have caused ecosystem damage as they are an invasive species. US farmed red swamp crayfish is a sustainable farmed seafood choice. In Europe, native freshwater crayfish such as the noble crayfish (Astacus astacus) and the introduced signal crayfish (Pacifasticus leniusculus) are produced in semi-intensive systems. In the UK the only native species, white-clawed crayfish, is approaching extinction as a result of the introduction of American signal crayfish. Native (white-clawed) crayfish are a protected species and must not be trapped. It is illegal to handle them without a licence.