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The present study was performed to aim the comparison of the body shape of large scale tongue sole (C. arel) fish from coastal waters of north Persian Gulf. To fulfill this purpose, a total of 120 fish individuals captured by bottom trawlers from the four stations of Kangan, Bushehr, Daylam, and Abadan were used. In order to study traditional morphometrics, 13 morphometric traits (measurable) and 6 meristic traits (countable) were selected and examined. Results of morphometric and meristic comparison showed a significant overlap among studied populations. Based on these results, the total length of fish was measured from 206.51 to 265.04 mm, 110-130 soft rays from the dorsal fin, 10-16 soft rays from the caudal fin and 82-98 soft rays from anal fin were counted. The mean number of scales between two lateral lines was 7.72. Comparison of means resulted from traditional morphometric study revealed no significant differentiation between different stations. The results of geometric morphometrics revealed significant differences between the studied stations in that the highest difference was belonged to specimens from Abadan and Kangan, whereas the lowest difference was observed in the specimens from Bushehr and Daylam samples. Based on the results of the present study, it can be concluded that geometric morphometric method possesses higher potential to discriminate populations of the studied species compared to the traditional method. 

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This study aimed to investigate the effects of different temperatures (20, 27 and 33 °C) and two feeding rates (2.5 % biomass per day and satiation) on growth performance, body composition, hematology and blood biochemistry of Asian sea bass (Lates calcarifer). For this purpose, 8 fish with an average initial weight of 99.55 ± 0.24 g were randomly transported to 200 liters tanks (6 treatments with three replicates) and fish feeding was done using a commercial feed for 6 weeks. At the end of the experiment, the growth performance, blood indices and chemical composition of fish carcasses were measured. The results of this study showed that the feeding rate of biomass (2.5%) and satitation had no significant effects on growth performance and nutrition of this fish (P<0.05). However, different levels of temperature showed a significant effect on these indices (P <0.05). The average final weight of fish grown at 33 °C and fed at the biomass level was higher than other treatments, although this difference was not significantly different from that of the stored group at 27 °C. Among the hematology parameters, the number of red blood cells showed significant changes among treatments (P<0.05). Plasma biochemical parameters such as triglyceride, glucose and cholesterol level were significantly affected by water temperature and feeding rates (P <0.05). The activity of liver enzymes in plasma was not significantly different in different treatments (P <0.05). The protein and lipid content of fish carcasses increased with increasing temperature so that the group stored at 33 °C had the highest protein and lipid content (P <0.05). In general, the results of this study showed that temperatures above 27 °C are more optimal for this species and the feed rates of biomass and satiation have no significant effect on the growth and health performance of this fish in this temperature range.