Squamous disease. The disease is also known as vertical scale disease, pine scale disease. The scales of ruby fish open like pine cones, and the base of the scales is edematous and congested. In severe cases, the base of the fins is filled with translucent liquid. Later, the belly of the fish swells and loses balance. Died soon.

—generally popular in the season of low water temperature or when the water temperature changes in a short period of time , Older fish are susceptible to this disease, the use of salt, nitrofurazone, antibiotics and other treatments, the affected area smear dermatitis has better results.