A great experience
My wife and I really enjoyed spending a day at the Birch Aquarium.
It's not the Georgia Aquarium, but that might be part of the appeal -- the exhibits are really manageable in scope and size, so you get a more personal feel, and maybe learn a bit more?
Lots of interesting exhibits, and when you want to take a break, there are great views of the ocean and La Jolla to be enjoyed.
If you're a saltwater aquarium owner & a member, you can get good saltwater for free from their system (they have a hose for you to fill your buckets) to keep your pets happy and healthy!