The main tank at the Okinawa Churaumi Aquarium. The 'Kuroshio Sea' holds 7,500 cubic meters (1,981,290 gallons) of water. The music accompanying the video is "Please Don't Go" by Barcelona.Watch it full screen for maximum coolness:
It's a beautiful and majestic sight. I think one can't help but have a moment's dismay at the loss of freedom for these creatures that were previously cruising an unlimited expanse of ocean, but perhaps if displays like this draw the public's attention to the wonders of the ocean, then that provides sufficient justification.