The bubbles on the rat fish are not contagious. It is not contagious to people. The main pathogen of fish white spot disease is a protozoan called melon, which can only infect fish, and this microorganism is not resistant to high temperature. Above 28 degrees, you will die. As we all know, people's body temperature is around 37 degrees Celsius, which means that they die instantly when they come into contact with people's skin, and it is impossible for them to invade the human body and make people sick. I hope my answer can help you. Don't wipe off the rat fish with a cotton swab soaked in salt water. The disinfectant bubble is not contagious. Rat fish is a member of Aspidoras (genus A), Brochis (genus B) and Corydoras (genus C) in Carassius subfamily.