The blood cells development has been observed in head kidney, spleen and liver of Misgurnus anguillicaudatus . The development process of blood cells can be divided into three stages: the primitive stage, the immature stage and the mature stage. Head kidney is the principal haemopoietic organ, and spleen is the second . No primitive blood cell can be seen in liver, so liver isnt a haemopoietic organ probably. It emphatically described the morphological characters of the blood cells at different stages in this paper.

The morphology of the peripheral blood cells of Misgurnus anguillicaudatus has been studied by light microscopy. Examination of wright's stained smears of the peripheral blood has revealed the following cell types: erythrocyte, neutrophil granulocyte, eosinophil granulocyte, monocyte and thrombocyte.The immature erythrocyte, immature neutrophil and immature monocyte are present in peripheral blood also. The neutrophil granulocyte, lymphocyte and thrombocyte are abundant among leucocyte, while monocyte is the biggest,and thrombocyte,the smallest.