Doug, some (although not all) of the seagrass/eelgrass species you have on the BC coast there, have ranges that extend down to the Sea of Cortez. I don't have any of my reference material handy, but I beleive that the Sea of Cortez enjoys water temperatures CLOSE to (albeit not quite exactly) that of a "typical" reef aquarium.
Again I don't have my texts handy with me but it's something I can check at home (as to which species it is that goes down that far south) and get back to you if you're interested. I've often wondered how well those species would do in one of our tanks. The ones that stay in the temperate zone, obviously no need to try those of course. I'd try it myself but unfortunately a walk to the beach and back with my shovel and a bucket is a little far for me.
