What happened?

Ok, what is the deal? I had a whole mussels meal planned for Canada Day dinner and I went all over town (well, to all the big grocery stores anyways) and was thwarted at every turn. I saw plenty in tanks just the day before (and had been planning the meal every since) but what the feck happened today? Did I get there too late? Or is Vancouver just out of mussels? Plenty of clams, lobster and fish, but where are my fresh mussels?!?