Apparently some pet fanatic who lives in a very small apartment decided to conserve space by combining two pet habitats in one. The birds live in an acrylic box mostly submerged in a fishtank. While it does look neat, I imagine someone out there is calling the SPCA or PETA. Reminds me of the time I combined two pets. My sister's prized hamster and my snake. She hasn't spoken to me in nine years.
The Birdtank [neatorama, thanks to pet friendly Derek for the tip]