"At Pier 39, more than 20,000 sea creatures from the San Francisco Bay and California coastline await your visit. Walking through the aquarium's transparent tunnels immerses you in the bay's diverse aquatic life, as you come eye-to-eye with the native sevengill sharks, watch the hypnotic motion of the jellyfish, and even touch a grand bat ray’s wing, if you dare. Four adorable otters live here, too. The aquarium hosts daily naturalist-led animal feedings, and curators give talks about tide pools, octopi, and climate change, interactive experiments. New virtual-reality experiences allow you up-close "access" to whales and polar bears. Otters, considered watershed ambassadors, are indicators of healthy waterways. Splurge on a behind-the-scenes tour and shark-feeding tour in addition to the regular admission ticket, and you'll have an unforgettable day at this amazing waterside habitat."