An aquarium is a transparent tank or container filled with water, designed to house aquatic plants and animals. It can range from small home setups to large public displays. Inside, various species of fish, invertebrates, and plants thrive in a carefully maintained environment. Aquariums often have filters to maintain water quality, heaters for temperature control, and lighting that mimics natural conditions. Some aquariums feature decorations like rocks, artificial corals, or submerged structures to enhance the aesthetic appeal. They serve both as captivating decorative pieces and as educational tools, promoting the study and appreciation of marine life.