Adding live plants to an aquarium does more than just improve aesthetics - plants provide shelter, food for vegetarian fish, and prevent green water. Plants also soak up carbon dioxide, waste products, contribute oxygen to the water, and promote the growth of algae, tiny worms, rotifers, and protozoa, providing live food for the fish.
Saltwater aquarium fish are amongst the most beautiful of animals to be found anywhere in the world. A variety of saltwater aquarium fish can be housed in your marine tank provided you know what they need in terms of care, such as feeding, environment, competitors and space to grow.
The practice of keeping aquariums came about in the late 1800's. They were fairly crude. Usually these ancient aquariums only had one side that was made of glass, with the other three sides being made of metal or wood. Most aquariums consisted of fish that were native to the region of its owner simply because of availability. Also most old school fish tanks contained only fresh water fish. The reason being that salt water would corrode the metal frame that held the aquarium together.