there are a few in richmond, but the best is obviously big als
there is a small shop on tenth called noahs pet ark, owner is graham. nice shop some unusual stuff hes into his killis. no monsters though. its well worth a look though.
massive aggression isnt that far outside vancouver and there are a few shops in burnaby from what i remember not been to them myself. theres a mall out on 49th(i think) the asian fish market is fun as they had some snakeheads there as food and i picked up two obscura once only one survived but worth checking these shops