Fish are an important source of protein and omega oils essential in our diet. In addition to farmed salmon and shrimp (that require large quantities of caught fish as food) there are over 200 other commercially cultivated fish. These include filter feeders such as oysters and mussels that effectively clean the surrounding water so small-scale farming is not damaging to the local eco-system.

Crayfish are exported from China; these vegetarian fish are farmed in rice paddy fields using drug-free, low maintenance techniques. There is concern that pesticide residues may be present from runoff. Other species of vegetarian fish that do not require landed fish for food include carp, catfish and tilapia.

The Marine Stewardship Council (MSC), is an international non-profit organisation that has developed a Standard for well managed and sustainable fisheries. The three principles of the Standard consider the condition of the fish stocks, the impact on the surrounding ecosystem and the management of the fishery.

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Buyers concerned about overfishing, fisheries and the associated environmental problems can look out for the MSC logo on seafood and be reassured that they are not contributing to the alarming problem of overfishing.