This study included the effect of differant types of fishes in some of the blood measurements and the biochemical characteristics in Qarata region\ Shwan township\ Kirkuk. A total of 113 fish's were collected during the experiment period from 15 November 2017 to 15 July 2018 It contained 7 species which was: Cyprinus carpio, Leuciscus vorax , Chondrostoma regium, Caepota umbla, C. trutta, C.damascina , Squalius lepidus All the fishs came back to the Cyprinidae family and Leuciscidae family. The phenotypic measurements included total weight, standard length. Also the most important blood measurements such as the concentration of red blood cells (RBC) and white blood cells (WBC), and packed cell volume (PCV) , the rate of blood cells and the concentration of hemoglobin (Hb%). Measurements were carried
out on serum of caught fish and the total protein, glucose and cholesterol levels were determined. The results of the statistical analysis of WBC showed that the Squalius
Lepidus fish was significantly superior to the rest of the fish. The PCV and Hb differed where all types of fish was increased except the Squalius Lepidus. the highest value of total protein was recorded for Leuciscus vorax and varied significantly on the species 4.88 ( mg/dl). As for glucose, the highest values of Cyprinus carpio and C. damascina were 266.40-253.33 ( mg/dl) respectively. While The value of C. damascina was the most significantly of the species, reaching 586.26 ( mg/dl) in cholesterol.