Final answer:
The nucleus in Whitefish Blastula can be found within the individual cells.
Step-by-step explanation:
The nucleus in Whitefish Blastula can be found within the individual cells. When observing a cross-section of the Whitefish Blastula under a high-power microscope, you will notice that most of the cells are not undergoing mitosis but are in the interphase period of the cell cycle.