The Labyrinth Aquarium
The Labyrinth Aquarium is the gerbil cage of aquariums.
This Jellyfish Aquarium made the list not because of the aquarium, but because keeping jellyfish as a pet is extreme. Jellyfish are fragile so the aquariums must be designed with special care to keep them from being killed by the filtration. This aquarium is an awesome 2011 kickstarter project.
The Fish Highway
The Fish Highway allows fish to travel from one tank to another across an entire room.
Fish N’ Flush
The Fish N’ Flush is a kit to replace your toilet bowl with a fish bowl. The company that originally designed the Fish N’ Flush only made 2,000 so if you want one you’ll have to get lucky on eBay.
The Car Aquarium is an exhibit at Siam Ocean World in Bangkok.