The present study is the report on the effect on turbidity in Penaeus vannamei culture shrimp farm (Green shrimp aqua farm) in Parangipettai, Cuddalore district, Tamilnadu, India. The study was conducted in six culture ponds at different stocking densities. Crab fencing and bird netting was done before pumping water to prevent the auto entrants. The average pH reading for the AM was 7.9 to 8.8, while a pH of 8.2 to 9.1 was recorded in the PM. After 70th DOC two ponds water quality suddenly changed as a turbid colour. All parameters like alkalinity, nitrate, nitrite and ammonia were maintained normal. The average body weight recorded 14 grams in 70th Doc. After turbidity more number of cannibalism observed in the check tray as well as under the aerator. This problem observed all the three turbid water ponds, even though all the parameters are in good condition. The shrimps were harvest; the total production was 9,000kg. the present study conclude that, turbidity is become the one of the major problem for cannibalism in Penaeus vannamei culture ponds.