A saltwater aquarium is a type of fish tank that contains saltwater, mimicking the natural environment of ocean habitats. These aquariums are home to a variety of marine life, including coral, fish, and invertebrates. Maintaining a saltwater aquarium requires careful monitoring of water salinity, temperature, and pH levels to ensure the health of the aquatic organisms. Setting up a saltwater aquarium can be more complex than a freshwater tank due to the specific needs of marine species. Equipment such as protein skimmers and live rock is often used to help filter water and provide a natural habitat. Regular maintenance, including water changes and testing, is essential for a thriving saltwater ecosystem.