Also, the regulation for importing aquatic pets has been updated. Doesn't really affect reef keepers. You are supposed to declare that you are bringing in aquatic pets. So far, I've just declared it verbally without needing to fill out any forms. Of course, they could ask for receipts, and species name, and proof if they wanted to, so always have them ready.
http://www.inspection.gc.ca/animals/.../1331908089467