Conservationists say cherished creatures such as whales, dolphins and seabirds are being killed in large numbers by fishing tackle Conservationists say cherished creatures such as whales, dolphins and seabirds are being killed in large numbers by fishing tackle Thousands of Britain’s most charismatic and protected marine wildlife, including whales, porpoises, dolphins, seals and seabirds are being killed as “collateral damage” by fishing vessels every year, according to the first-ever analysis