In the present work an attempt has been made to study the effect of different kinds of supplementary feeding on certain blood parameters in a freshwater air breathing murrel fish, Channa marulius (Ham.). Different haematological values in control (Group I) group of fishes were RBC counts, 2.1±0.006 million/mm3; Hb content, 10.8± 0.10 g%; PCV or haematocrit value, 32.0±1.42; MCH, 5.143 pg; MCV, 15.42 mm3 and MCHC, 33.75%. The experimental animals were fed with six (Group II-VII) types of supplementary feeds which caused significant increase in RBC counts, Hb content and PCV values as compared to control which is indicative of the facts that experimental animals become more healthy as compared to control. The reason for such changes have been discussed in this paper.