Depending on the feed quality, variation in fish size becomes obvious. Fishes are graded and kept in different cages. Better the quality of feed and shorter will be the seed sorting interval. Normally, sorting is done once a month that means during the culture cycle of 6-7 months it requires 5-6 sortings. Fish are sold when they get larger than 400 gm. If smaller fish are kept further to grow. Sorting is done from late morning to noon.
Unlike pond cultured fish, marketing of caged fish is very easy. Retailers come to the cage sites at a pre-set time, and collect on desired amount of fishes. The cage operators usually sort out the marketable sized fishes a day before selling date. Feeding is stopped 6 hours before harvest. Usually fish sellers collect two times from the cages, in the morning and in the afternoon and sell them in different markets even in neighboring village markets. In addition, some sellers collect live caged-fishes early in the morning and ferry them to the urban housing areas to sell live fishes.