The peripheral blood cells of Jaguar Guapote (Cichlasoma managuense) were morphologically described.On the stained smears of peripheral blood,erythrocyte,neutrophil,eosinophilic granulocyte,monocyte,lymphocyte and thrombocyte,were distinguished,but basophilic granulocyte was not found.In addition,some immature and dividing erythrocytes could be observed.Among these leucocytes,the thrombocyte was the smallest cell while neutrophil the largest; and the number of eosinophilic granulocyte was the least,while that of thrombocyte the most.