Aquarium Wave Or Tide How Do You Build A Wave/tide Pool Like The One In Monterey Bay Aquarium?

How do you build a wave/tide pool like the one in monterey bay aquarium? - aquarium wave or tide

I know how I can build a pool in the garden. I want a machine that gently back and forth through the water makes as small waves. If you are ever in Monterey Bay Aquarium, with a small wave machine in an area with a lttle bit of sand. It's like a small beach and a side view, as you'll see your foot behind the glass. Any help to start working on this or any ideas that you would be very useful to you? Or if you know what she would do with these North Atlantic Fisheries Ministers also be useful.