An aquarium is a transparent container filled with water where people keep fish and other aquatic creatures. It can be small, like a fishbowl, or large, like a public display in a marine museum. Aquariums provide a beautiful way to observe underwater life and can be a relaxing addition to homes or offices. Setting up an aquarium involves choosing the right size, adding water, and creating a suitable environment for the fish. This includes using filters to keep the water clean and heaters to maintain the right temperature. Many people enjoy the hobby of maintaining aquariums, learning about different species, and creating vibrant underwater landscapes.