For MO J&L is OK, as is
www.saltwaterconnection.com in Winnipeg. For dry goods there is also
www.mops.ca out of Ottawa.
www.seacare.org is also a good place to get stuff (livestock) from.
LFS ... there is Big Al's, Wai's, Pisces, Riverfront, Oceans, Golds, and ... and ... I'm sure I'm missing a bunch here. It's kind of a touchy topic, but each has their own strengths and weaknesses, good days and bad days.