Seafish is to undertake a comprehensive review of the plethora of 'fish to eat' and 'fish to avoid' lists to provide clarity over which lists are to be most trusted in sourcing fish.

A review was needed, said Seafish, because some guides are influenced by the funding requirements or political agendas of the organisations that produced them and often contradicted each other. Greenpeace, for example, claimed Alaskan pollock stocks were in danger of collapse, for instance, while the MSC said they were managed sustainably.

"We want to cut out the confusion so consumers and buyers know where to go for an objective scientific picture of which stocks are sustainably managed," said development director at Seafish, Dr Jon Harman.

The project will be led by a Fish Sustainability Information Group of seafood bodies from around the globe.