Ornamental fish, also known as aquarium fish, are species of fish that are kept primarily for decorative purposes in home aquariums, outdoor ponds, or water gardens. Unlike fish bred for consumption, ornamental fish are valued for their beauty, vibrant colors, unique patterns, and graceful movements. They are often considered living art pieces that bring aesthetic pleasure, relaxation, and even emotional benefits to their owners.

There are thousands of ornamental fish species, both freshwater and saltwater, each with distinct appearances and care requirements. Some of the most popular types include goldfish, betta fish, guppies, angelfish, and koi. These fish vary greatly in size, shape, behavior, and habitat needs. Many have been selectively bred over generations to enhance their color, fin shape, and overall visual appeal.

The keeping of ornamental fish is not just a hobby; it is a careful practice that involves maintaining water quality, providing appropriate food, and creating an environment that mimics their natural habitats. Enthusiasts often invest time in understanding water chemistry, filtration systems, lighting, and aquatic plants to ensure the health and longevity of their fish. In many cultures, ornamental fish are also considered symbols of prosperity, luck, and harmony, adding a deeper meaning to their presence in homes and public spaces.