Our host in ichthyological expedition located just around the corner, is the owner of the fish production unit of the company Tasty Fish, located at the mouth of Acheloou, on the southwestern tip of Aitoloakarnanias. On farms like ours where the fry comes about by bigger, integrated units, the principle is the placement of juveniles in cages from 1.5 to ten grams (aged 120-230 days). The fish grow and when they reach a weight of 70-80 grams, pass the stage of sorting and management. Here we need special attention. For the same species, is of great importance to be placed in fish cages exact same size, in order to avoid cannibalism.