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Four stocks or species are thought to be extinct , two are no longer found in Canadian waters , and 49 are listed as endangered , threatened , or vulnerable . Note : Great Lakes deepwater sculpin ( Myoxocephalus thompsoni ) is currently listed as threatened in Canadian waters . " ( 1 ) Within 30 days of the application by Canada of export controls on unprocessed fish under statutes exempted from the Agreement under article 1203 , or the application of landing requirements for fish caught in Canadian waters , the President shall take appropriate action to enforce United States rights under the General Agreement on Tariffs and Trade that are retained in article 1205 of the Agreement . This database contains information about ships that were registered in Canadian ports or sailed in Canadian waters . Although it has not yet been definitely recorded in Canadian waters , there can be little doubt that it occurs here .