Shell of the prawn is persistently soft, loose and papery for several weeks. In acutely affected shrimp, lesions/blisters may develop and the body becomes very soft. The shrimps become weak and susceptible to cannibalism. It is very common in traditional, extensive, seasonal as well as perennial ponds. Severely affected P. indicus show undulating gut in the first three abdominal segments.  

CAUSE  

This disease is found to occur during adverse environmental conditions like sudden increase or decrease of temperature and salinity of ware, high soil pH, highly reducing conditions in soil, low organic matter content in soil, low phosphate content and pesticide pollution in water, nutritional deficiency in insufficient water exchange.  

DIAGNOSIS  

Based on gross signs and symptoms  

PREVENTION  

Feed adequately with balanced diets. Maintain good water quality by increased water exchange.  

CONTROL  

Restore good water quality by increased water exchange. Feed shrimps adequately with feeds such as fresh clam meat @14% of body weight for 2-4 weeks daily or formulated feeds fortified with calcium and phosporus.