Figure 17: TEM of L.S. O. niloticus of late stage spermatid of LM showing the nucleus (N) contains granular and less condensed chromatin, the mitochondria (M) being less in number and presence of large sized mitochondria. The centriolar complex,proximal centriole (PC) and (DC) are housed in nuclear depression called implantation fossa (IF). Notice the large number of vacuoles (V). (X 30000).