Affected prawns have very rigid flexed abdomen. These prawns lie on their sides at the bottom of the pond and are susceptible to cannibalism.  

CAUSE  

Exact cause for this disease is not known. The disease may be due to adversse environmental conditions.  

DIAGNOSIS  

Based on gross signs and symptoms  

PREVENTION  

Avoid handling shrimps during hot humid climate.  

CONTROL  

Not known.