i think its on sundays but im not sure.|||Actually, a whole week of discounts (original aquarium building free) is coming up, June 14-18. I'd recommend coming early or late to avoid the crowds (Monday - Wednesday the aquarium will be open 8 a.m. to 8 p.m. Thursday and Friday 8 a.m. to 6 p.m.)|||Their website lists "Community Discount Days", when admission is free, under "Plan Your Visit". These appear to be on selected Mondays and Tuesdays.

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