River Derwent: Agency removes illegal crayfish trap - BBC News

Murray River Crayfish (Euastacus armatus) - Environment, Planning and Sustainable Development Directorate - Environment

More than 20 illegal fish traps seized from rivers in North East

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River Derwent: Agency removes illegal crayfish trap

White-clawed crayfish The official blog for the North York Moors National Park

River Derwent: Agency removes illegal crayfish trap

Environment Agency seizes illegal traps threatening crayfish and eel