Been to the third one on the list, in 2018, and I wouldn't say it is good. The main aquariums at the Georgia aquarium are interesting in regards to fish watching, but there was a distinct lack of real information and often very clear miss-information, in particular with the marine mammals. The dolphins in particular did not have enough room in my opinion, nor did the river otters. In my opinion the aquarium's main concern was getting paying visitors in, and the big tank definitely did that. Other than the main tank, and the show there wasn't much to learn or see.
Sorry for raining on the parade, but I ended up feeling sorry for most of the inhabitants of the aquarium, I would be ok with that a bit more if the staff and descriptions provided better information about the creatures on display.