9. nontuberculous mycobacteriosis : Dr. Sladky said mycobacteriosis is the most prominent zoonotic disease easily transmissible by pet fish. He noted that most fishes are carriers of these organisms, and they do not show signs of sickness, but as soon as your hand is placed in the aquarium, the bacteria can gain access via an opening on the skin or a cut. It can lead to an infection which requires the application of long-term antibiotics. Professor Sladky said the individual suffering from this ailment would test positive on routing TB tests despite not having pulmonary TB. He also advised that humans should always wear powder-free gloves when they are cleaning their fish aquarium to prevent them from being infected by the disease.