Pet fish are popular aquatic animals kept in home aquariums. They come in various species, such as goldfish, betta fish, and guppies, each with unique colors and behaviors. Fish require a suitable environment, including clean water, proper temperature, and adequate space to swim. Caring for pet fish involves regular feeding, maintaining water quality, and monitoring their health. Aquariums can be decorated with plants, rocks, and other ornaments to create a natural habitat. Keeping fish can be a relaxing hobby and offers an opportunity to learn about aquatic ecosystems.