Silver Hake: A great and possibly better white fish alternative to cod and haddock that lacks name recognition but is increasingly being used anonymously in restaurant fish and chips.

FORBES: Seafood That's Trendy -- And Sustainable

This has caused substantial increases in the populations of whales and seals at the expense of fish stocks such as cod and haddock.

ECONOMIST: Greater Europe

On the wall behind the chip pans and sizzling haddock, there are signs saying when the fish was caught and by what ship.

BBC: Mislabelled fish slip into Europe's menus

Research reveals that 7% of cod and haddock - the deep-fried staples of British fish and chips - actually turn out to be cheaper fish substituted to cut costs.

BBC: Mislabelled fish slip into Europe's menus

This allows for boats to fish if they are practising "cod avoidance measures", such as eliminator trawls, which allow effective fishing for haddock and whiting while eliminating cod from the catch.

BBC: Fishing negotiations statement