Blood samples were collected within 35–40 s through the caudal vein of the fish in 1 ml disposable heparinized syringes. The blood samples were kept at 4 °C until the blood parameters were completely studied. The total red blood cell (RBC) count, hemoglobin (Hb), concentration, and hematocrit (Ht) value were determined immediately. Total RBC counts were counted using an optical microscope with a hemo-cytometer (Improved Neubauer, Germany) after diluted by Hendrick's diluting solution. The Hb concentration was determined using a Cyan-methemoglobin technique (Asan Pharm. Co., Ltd.). The Ht value was determined by the microhematocrit centrifugation technique. The blood samples were centrifuged to separate serum from blood samples at 3000g for 5 min at 4 °C. The serum samples were analyzed for inorganic substances, organic substances, and enzyme activity using clinical kit (Asan Pharm. Co., Ltd.). In inorganic substances assay, calcium and magnesium were analyzed by the o-cresolphthalein-complexon technique and xylidyl blue technique. In organic substances assay, glucose and total protein were analyzed by the GOD/POD technique and biuret technique. In enzyme activity assay, glutamic oxalate transaminase (GOT) and glutamic pyruvate transaminase (GPT) were analyzed by the Kind-king technique.