The optimum fishing day is based on moon

A research study found that fish and prawn prefer light whereas shrimp may not. There is a vertical movement of fish movement is found owing to light as on moon lit days when the fish catch may become more considering the fact the fishing efforts and gear remaining similar in all days of lunar periodicity. Estuarine fishes in Sundarban Rivers are caught more during such dates. Optimum fishing days may also determined by the intensity and duration of moon lit in total night hours.