I would guess that the 2 year old would be free if the age is not listed. You should probably call the Aquarium ticket office to verify, though.|||Usually if they break down the ages like that, it means that 2 and under are free or 3 and under are free. I am pretty sure you won't have to worry about paying admission. That's what is so cool about traveling with younger kids, when we went to Disneyworld, my 2 year old was free for everything.

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