These pictures of aquariums will show you different types of aquariums in different sizes.
This bookshelf aquarium is a cool idea.
Here's a plastic 10 gallon aquarium.
Here's a large oval coffee table aquarium.
Here's a coral reef aquarium with saltwater fish.
Here's an open top zero edge aquarium.
Here's a custom 125 gallon freshwater aquarium.
Here's a large saltwater aquarium with coral and living plants.
Here is a square coffee table aquarium and matching end table aquarium.
Here's a freshwater room divider aquarium.