We went. We had fun. I recommend it.
So here is the Seattle Aquarium.
It took us about 2 hours to go through it. So it isn't too big. It was just a very cool in the salt water tanks. The cuttlefish was really cool, but I was afraid to snap its picture for fear of scaring him. Also I starting talking to the Aquarium staff about how often they clean the tanks and their water filtration method and they allowed me to feed some of their fish. Again I wish I would have kept notes, but they were fast. Put the chunk of fish on a stick and BAM it snapped it off. Pretty cool stuff.