Figure 15: TEM of L.S. in seminiferous tubules showing different stages of spermatids of O. niloticus of LM showing early stage of spermatid (ES), middle stage of spermatid (MS) and late stage of spermatid (LS), all the mentioned stages have excessive number of vacuoles (V) in their cytoplasm and remain attached by the sytoplasmic bridge (CY). (X 5000).