Arezoo Azimi - MSc. student, department of fisheries, faculty of Fishery and environmental, Gorgan University of agricultural sciences and natural resources, Gorgan, Iran
Mohammad Reza Imanpoor - Associate professor, department of fisheries, faculty of Fishery and environmental, Gorgan University of agricultural sciences and natural resources, Gorgan, Iran
Rasool Maleknejad - MSc. student, department of fisheries, faculty of Fishery and environmental, Gorgan University of agricultural sciences and natural resources, Gorgan, Iran
Samira Shokrollahi - MSc. student, department of fisheries, faculty of Fishery and environmental, Gorgan University of agricultural sciences and natural resources, Gorgan, Iran

Objective: In this survey, we have checked the effects of natural (red bell pepper and tomato) and synthetic (astaxanthin and â-carotene) pigments on bloods factors of Flower horn (Cichlasoma sp.). Methods: Five treatments (three replicates/treatment) were employed. Fishes were separated in fifteen equal groups and were fed for eightweeks with diets containing10 g kg1 red bell pepper and tomato and 100 mg kg-1 astaxanthin and â-carotene. At the end of trial blood samples were taken from 5 fish that caught randomize by cutting the caudal stem. Results: Results of blood factors showedthere is significant differences between WBCs, RBCs, Hb, HCT and Lymphocytes between treatments (p<0.05). The best result observed in treatment fed with red bell pepper. Between The factors of Monocytes and Neutrophils, there was no significant difference between treatments (p>0.05). The results showed that the use of red bell pepper in diets for Flower horn is effective and profitable in its ration.

Pigment ، Blood parameter ، Astaxanthin ، â-carotene ، Flower horn fish