Hey fellas, I got this baby blue tang a week ago and has been hiding for the first few days but was always eating food that passed near it. It came out for a swim today and on one of its sides appears a weird growth. Any idea what this might be?
Video: https://youtube.com/shorts/0-GGlvv8wPA?feature=share
Video: https://youtube.com/shorts/0-GGlvv8wPA?feature=share