Have you researched /checked reviews of Mystic Aq. on the web...
I was there about 3 years ago, and as far as what a 'reefer' would like to see, there was almost nothing. Quite frankly, I was very disappointed in what they offer for the price, and time to get there.
That being said, if you are taking the kids, they might enjoy it.
IMO...Maritime Aq. in Norwalk is better, and Atlantis, far superior.