Keeping fish in the aquarium is old hobby that will never die. People like the bright and fancy fish with beautiful color and tails. In general, aquarium fish has two main categories: salt and fresh water. Both are different, not just in environment and water, but also the species and maintenance. The art of aquascape fish is to make the tank or aquarium as realistic as possible. You can decorate it with anything, but it should support the aquatic ecosystem.