Explore the deep “BOO” sea during Greater Cleveland Aquarium’s Pumpkin & Piranhas afterhours Halloween celebration. Full Aquarium access, four-page activity, themed décor and music, diver interactions, appearances by the friendly landshark Finn and special treat bags for costumed kids are all part of the fun. Capacity is limited and advance tickets for this warm and dry fall family outing are recommended to ensure entry and adequate treat bags.