Yolk globules formed in the cytoplasm with larger globular inclusions, while follicle cells were hardly recognizable. In the mature stage (stage 4), the color of the ovary become deep orange or reddish and started to enlarge to the maximum and eventually covered the hepatopancreas and the majority of stomach.
Size of the oocytes varies from stage to stage of the ovarian development. Mean diameter oocyte for stage 1 was 97.732±12.391 while for stage 2 was 149.516±23.287. Stage 3 showed increasingly of size with mean diameter was 158.506±27.616 and 181.013±24.339 for stage 4.