I contaced fisheries and oceans Canada about this a while back. Here is there response:
"Canada does not require an import permit or licence in order to import live ornamental fish from another country that will be maintained in aquariums.
Since the importation of ornamental fishes for hobby aquariums or the pet trade is considered to pose a negligible risk to native aquatic fish species, Fisheries and Oceans Canada has no act or regulation to licence the importation of live fish for ornamental use. No official documentation is necessary to clear Canada Customs and the importation of ornamental/hobby fish is not restricted. You may wish to have a copy of this email with you in the event the shipment is challenged by Customs.
You should verify with the CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) endangered species list to ensure the international trade in any of the species you wish to import is not restricted. For more information, please see the CITES website at
www.cites.org and Environment Canada's website
http://www.cites.ec.gc.ca/listedecon...List.swOptions.
Please be advised that the release or disposal of live or dead ornamental aquarium fish into wild fish habitat is prohibited in Canada.
Sincerely,
Nancy House
National Registry of Aquatic Animal Health /
Registre national de la santé des animaux aquatiques
Fisheries and Oceans Canada / Pêches et Océans Canada
200 rue Kent St
Ottawa, ON K1A 0E6
Tel: 613-990-7033
Fax: 613-993-7665"