For the experienced aquarist

Aren’t these saltwater fish in this photo by Dee Kull beautiful?

Saltwater tropical fish on the whole are more colorful than freshwater tropical fish. However, a salt aquarium takes more care than a freshwater tank. First off, you need at least a 30 gallon tank to maintain the proper environment. Saltwater fish need more space per fish and a better water quality than freshwater fish. Damselfish, clownfish, and gobies are hardy saltwater fish for the beginner aquarist.