Aquaristics is the science and hobby of keeping and maintaining aquatic environments, primarily focused on fish and other aquatic organisms. This practice involves creating and managing aquariums, which can range from small tanks to large, complex systems. Enthusiasts often study water chemistry, filtration, and the needs of various species to ensure a healthy ecosystem. In aquaristics, individuals may engage in both freshwater and marine setups. Freshwater aquariums typically house species like goldfish and tetras, while marine aquariums can include coral reefs and clownfish. Proper care and knowledge are essential for successful aquaristics, making it a rewarding yet challenging hobby.