in this study, 100 fish (astronotusocellatus) with density of 8 to 12 fish per aquarium distributed to four treatments (control, 0/25%, 0/5% and %1 macrogard) the experiment lasted forsix weeks. in this experiment it was observed that the number of white blood cells, especially neutrophils and serum the lysozyme level in fish fed with different levels macrogard were significantly increased comp...