Sealing the Deal

An issue of a popular fishing magazine (http://www.anglersnet.co.uk/fishing-magazines/sea-angler-456.html) contains an article by an 'Environmental Biologist' who claims that the UK's Grey and Common seals are 'doe-eyed assassins' getting away with the murder of 'our' fishing stocks (and need urgent culling). The seals are clearly evolved to feed on fish (they do it efficiently) but the idea that that are more of a problem for fish stocks than human activities seems risible. Anyhow, whose fish are they?