The present study emphasises the culture of milk fish (chanos chanos) in open ponds by the Tamil Nadu fisheries department at parangipettai. Wild seeds of milkfish were collected from the river creek (running from the velar estuary to the parangipettai landing centre) and introduced into the culture ponds. These ponds were maintained for the benefit of the fish farmers. The periodical analysis of physico-chemical parameters such as temperature, salinity, turbidity, pH and dissolved oxygen showed values less than the optimum level. The water samples subjected to biochemical analysis for the identification of bacterial strain showed positive results for catalase, oxidase and citrate tests; that reveal the presence of acute level of the bacterium Pseudomonas septicaemia.