Hey there BabsinWC, thanks for your question about the Samsung Galaxy Fit3. Yes, the advertised Galaxy Fit3 can track movement during water aerobics, as it is rated 5ATM and IP68 for water resistance. It offers a dedicated "Pool Swim" mode to track metrics like duration, distance, and strokes, and includes a Water Lock feature to prevent accidental screen touches. If you have any other questions for us or if you would like further assistance, please feel free to contact Support at your earliest convenience. Thank you for being a treasured Samsung customer. - Debra