In the present study an attempt has been made to study the effect of ambient water temperature on the blood of an air breathing fish, Channa punctatus. Bl. The fishes were tested at 10�C, 20�C (control) and 30�C. A trend of increase in RBC counts and decrease in packed cell volume (haematocrit) and MCV with increasing temperature was observed but the differences in differnt blood parameters between control and tested groups were statistically nonsignificant (P>0.05), therefore, it can be suggested that the changes in blood components are not associated with fluctuation in water temperature only rather certain other factors seem to be involved in it. The details have been discussed in this paper.