The Aquarium is under the Bay and it's built so that the sharks and rays swim alongside or at us or over our heads.  The acrylic-walled enclosure keeps us dry and not swimming with the sharks. From the Aquarium website:
    "The 50,000 square foot facility features 300 feet of crystal clear acrylic tunnels holding over 700,000 gallons of filtered Bay water.  The Aquarium is home to over 20,000 aquatic animals, including sharks, bat rays and skates.  It also encompasses three touch pools and numerous other displays."

The still pictures, following the videoclips, are mainly fuzzy ones because I then used a camera with only a zoom lens (70-300mm), which isn't meant for narrow, close spaces like this with fast moving creatures.  But there are some vague impressions at least, and there are a couple of outdoor scenes from San Francisco's Pier 39.  This is just a great place to visit, and I, a native of SF, didn't even know about it.