Don't forget though Quinn, that although a softey like a mushroom may not be CITES listed, if it's attached to a piece of live rock rubble, guess what, the live rock is CITES.
And gosh darn it Kyle, it's CITES not cities
www.cites.org
Nemain, I don't know what the process is per se either, but it goes something like this. The exporter needs to have a CITES permit, and if you're carrying livestock (CITES or non-CITES) I believe you might also need a Fish & Wildlife permit from the U.S. You might want to give Canada Customs a call and see what they advise (haha, have fun with that phone call, that won't be a long and runaroundish type call at all
)