A saltwater aquarium is a type of aquarium that houses marine life, including fish, corals, and invertebrates, in a saltwater environment. This setup mimics the natural ocean habitat, requiring specific equipment like a filtration system, heater, and lighting to maintain water quality and temperature. Maintaining a saltwater aquarium involves regular monitoring of salinity, pH, and other water parameters to ensure the health of the inhabitants. Popular species include clownfish, tangs, and various types of coral, which contribute to the aquarium's beauty and ecosystem balance.