This amazing little attraction harbors more than 3,000 organisms and 500 species of Hawaiian and South Pacific marine life, endangered Hawaiian monk seals, sharks, and the only chambered nautilus living in captivity. The Edge of the Reef exhibit showcases five different types of reef environments found along Hawaii's shorelines. Check out the small new Northwestern Hawaiian Islands exhibit that explains the formation of the island chain, the Ocean Drifters jellyfish exhibit, outdoor touch pool, and the self-guided audio tour, which is included with admission. The aquarium offers activities of interest to adults and children alike, including the monthly Aquarium After Dark program when visitors grab a flashlight and view fish going about their rarely observable nocturnal activities. Plan to spend at least an hour at the aquarium, including 10 minutes for a film in the Sea Visions Theater. www.waquarium.org. COST: $9. OPEN: Daily 9--5; last entrance 4:30.