Arabibarbus grypus (Heckel, 1843) is one of the native and valuable fishes of western and southwestern regions of Iran, especially Khuzestan province. The aim of this research is to measure feeding efficiency and gradual adaptation of Shirbout fish in different salinity. In this experiment, the survival rate, growth rate and feeding efficiency were measured in 4 levels of salinity (5, 15, 10, 20 g/L), with an average fish weight of 50.27±0.18 g for 2 weeks. In order to evaluate feeding behavior and tendency, Shirbout fish were fed and examined for 6 weeks with an average weight of 66.95±0.49 grams, at a daily rate of 5% of body weight with 4 treatments, including feeding with 60% pelleted alfalfa, pelleted common carp feed, Floating extruded common carp feed and floating extruded trout feed. In the study of feeding efficiency in different salinities, the fish continued to live up to 15 g/L salinity, but growth and feeding were not observed in any of the treatments. The results of feeding functions showed that the Shirbout fish prefers to feed from the bottom when choosing its type of food in captivity, but among the different diets examined, trout diet is more attractive for fishes (average eating time 11.82±0.10 min. In examining the effectiveness of the feeds, the results showed that the average daily growth rate in feeding with trout diet was 1.32±0.25 g per day and feed conversion ratio (FCR) was 1.53±0.29, which showed a significant difference compared to other treatments. Also, the chemical composition of the carcass had a higher protein content when fed with trout diet.