Fish Tank Coffee Table.

Have a look at this excellent coffee-table shaped aquarium from Clear-Seal. Each coffee table comes with a “toughened glass top” with polished, rounded edges for safety, a light diffuser, a progressive filter system. In your choice of finishes: Dark Oak, Light Oak, Limed Oak, Medium Oak, Yew, Mahogany or Mirrored glass, and in several size.
But, with the tips offered by these guys, one could surely come up with a DIY version customized to fit your space.