Figure 1: Embryonic development of Pangasius pangasius (a) fertilized egg (b) blastodisc (c) two cell (d) four cell (e) eight cell (f) sixteen cell (g) thirty two cell (h) sixty four cell (i) morula (j) blastula (k) gastrula (l) ā€œCā€ shape embryo (m) hatchling.