Canada Customs (plants and fish)

Paul Krombholz has voluntered to ship me some live stuff (daphnia) and we 
were wondering how Canada Customs would view this.

There must be a lot experience in transporting plants and fish out there.  
Any potential border crossing problems we should be no about? (Either 
shipping to Canada or alternatively shipping to the States.)

Thanks in advance.
(Still  # @ing  cold in Winnipeg)