Aquarium species refer to various types of fish, plants, and invertebrates that are kept in home or public aquariums. These species are chosen for their beauty, behavior, and compatibility with other aquatic life. Common aquarium fish include goldfish, betta fish, and neon tetras, while popular plants might include java fern and anubias. Maintaining a healthy aquarium requires understanding the needs of these species, such as water temperature, pH levels, and tank size. Proper care ensures that the aquarium ecosystem remains balanced, allowing both fish and plants to thrive in their aquatic environment.