Is this aquarium pretty large? And is there a lot to see?

I didn't think it was that large. Remember this aquarium pride's itself at having aquatic life that is indigenous to the area. That makes it very limiting. The Newport aquarium is much larger and has much more varieties of fish and animals. It's hard to beat it for a great aquarium experience.

Compared to aquariums in other cities this is a VERY small aquarium. Not a lot to see, but they do have a few high value exhibits(sea otters, puffins, octopus). That being said, if you are interested in local fauna the Seattle aquarium does a better job than most at displaying them and educating about them.

Yes it is pretty large and there are plenty to see

The merit of the Seattle aquarium is not the size. It cares the wild see lives and kids learn how to live with natural environment while satisfying their needs for learning. The best!!!

The aquarium consists of many indoor salt water exhibits and outdoor exhibits of seals, sea otters, river otters, and much more. They also have hands-on exhibits of different sea life which is really fun for all ages. We seem to spend a good couple hours every time we go just enjoying the large salt tanks of colorful varieties of fish.

Yes!

Yes, I'd say so. Multiple floors, many impressive tanks on exhibit.