A water aerobics instructor teaches fitness classes in an aquatic setting. In this job, you may perform your duties at a fitness club, YMCA, community center, or other facilities with a swimming pool. Your responsibilities are to provide instruction, model the aerobic exercises for students, and ensure that they perform the movements correctly. You also provide aerobic exercises that are suitable for the age and fitness level of the students and ensure that students remain safe during the class. Some fitness centers seek water aerobics instructors who can also teach swimming and oversee other aquatic sports.