This is a strong contender for one of the worst pinniped exhibits that I've ever seen, and the photo shows approximately 75% of the enclosure. There are two harbour seals and one northern fur seal in the pool.
The harbor seal exhibit is being renovated and the two seals have been temporarily housed at nearby Point Defiance Zoo. The updated exhibit will re-open in June of 2013 and there will be a possibility of the aquarium holding 3-4 seals in the future instead of the current two. Scroll down on this link to see an artist's rendering of the habitat:
