TIME AFTER SPAWNING
2 HOURS

Figure 2.4 Time 2 hours

The egg is well into embryogenesis at this time. This figure shows a number of stages of embryo development. The latest stage of development at this time is approximately the 6^th (64-cell stage) and 7^th (128-cell stage) cleavage. By this time a layer of cells has formed at the periphery of the egg, called the blastoderm. Differentiation of cells to form various tissues required for development of the nauplius has begun.

2.4