Rescuers saved a North Atlantic right whale that had become entangled in U.S. waters.  An investigation found that the cetacean was trapped in fishing gear that originated in Canada. Marine mammal rescuers discovered the whale entangled in lobster fishing equipment in waters off the southern U.S. Officials from the U.S. and Canada's Department of Fisheries and Oceans (DFO) traced the equipment back to an area used for lobster fishing in southern Nova Scotia. "This reinforces the importance of our ghost gear retrieval efforts that have been underway now for a few years," said Adam Burns, an official at the DFO. The animal was given the official catalog number of North Atlantic right whale 1218, also known as Argo. North Atlantic right whales are an endangered species and only 350 are estimated to still exist in the wild.