Hmmh... just keep a close eye before it spreads to your other fish.
Scale shedding
Latin name:
Other names: Scale protrusion
Pathogen: bacteria
In the early stages, scales protrude in patches (otherwise fish look healthy). As the disease progresses, scales begin to stick up all over the body. This is caused by the formation of small bubbles filled with serous fluid (pustules). These pustules are situated under the skin in places where scales are attached to it. Sometimes loss of scales will occur. The formation of pustules, scale protrusion, and loss of scales cause the disruption of gas exchange, which is particularly dangerous for young fish whose gill apparatus is not well developed and for whom dermal respiration is very important. Diagnosis cannot be based solely on these symptoms, as scale protrusion is observed in fish infected with Mycobacteriosis and Ichthyosporidium. It is necessary to carry out microscopic examination of smears of the contents of the pustules and tissues adjacent to them. It might be necessary to perform microbiological examinations of inoculations of the hypoderm and viscera (the kidneys, liver, heart, and spleen).