There isn't much info about fish off the northern coasts of the US or any other cold water species I know the Catalina goby is a good option, but are there any other fish suitable for cold water aquariums.

i was wondering the same thing

Not sure about fish but strawberry anemones are awesome!

Link to pics:http://www.oceanlight.com/lightbox.php?sp=Corynactis_californica

Liveaquaria has a few right now.

http://www.liveaquaria.com/diversden/ItemD...&ddid=48509
http://www.liveaquaria.com/diversden/ItemD...&ddid=50601
http://www.liveaquaria.com/diversden/ItemD...&ddid=50765

other than that, Catalina gobies are pretty much the only option, unless you can catch things yourself.

gulf of maine has some...but they either get huge, or they're ugly as heck