Believe it or not, in the United States, there are more pet fish (171,700,000 freshwater and 11,200,000 saltwater, according to the American Pet Products Association
) than dogs and cats combined. Most of them live in humble abodes—either a small glass bowl or, at most, a rectangular tank shared with plastic pink castles and fake plants. But some fish like to swim large. We've compiled a list of the most over-the-top tanks for your water-bound companions, from a bowl that gives constant social networking updates for goldfish to a cage that brings creatures from sky together with those from under the sea. Sure, most would look out of place in the average home, but if you’re a true enthusiast it may be worth it.