Impossible Fish Tank (аквариум с хитрой рыбокормушкой)

I don't know how this fish tank works exactly, but from what I could understand, the tank on top that joins the adjacent tanks works as a vacuum. The result is that there are feeding holes in the side of the tank, and the water does not flow out. I could not wrap my mind around this technology, but it works.
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This rockfish was by far the most tenacious fish in the tank. He boxed out all of the other fish, until he had his fill.
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отсюда via uchood@lj