Extended Summer Hours at the Birch Aquarium. All exhibits and hands-on activities — including the newest touch pool exhibit where guests can touch juvenile sharks — will remain open and guests will also be able to explore a new 600 cylindrical Moon Jelly experience in the Hall of Fishes. July 1–Aug. 31, 9 am–7 pm. $15–$19.50. 2300 Expedition Way., La Jolla. Reservations required at www.aquarium.ucsd.edu.