It is a case of wolves in fishermen’s clothing as several of them have been spotted pulling crab traps from waters off Canada’s west coast in what scientists say may be the first documented case of the animals using a tool. Members of the Heiltsuk Nation, an Indigenous government in the province of British Columbia , had placed the traps to capture invasive green crabs that destroy eelgrass habitats which support marine life and decimate the clam, herring and salmon populations the tribe