The Marine Conservation Society (MCS) is calling for consumers to boycott cod, haddock and other fish from depleted stocks in an attempt to force supermarkets to buy from sustainable sources.

The MCS has divided fish into three categories, two of which are acceptable and one classed as “fish to avoid’, which includes haddock, cod, brill, plaice, swordfish and tuna.

The Society has said that the difficulty for consumers is that some species such as cod come from many sources, some of which are acceptable and some from depleted stock.

While cod caught in the Pacific is acceptable for consumption, Atlantic cod is over-fished, and so the conservation body has suggested the consumer could help by demanding proper labelling and asking stores where their fish comes from, reported The Guardian today.