I'm missing something simple here I know, I want to have a sphere with a fish eco system, easy done right?? Yes and no!

I have my eco system sphere with water material and fish added as an eco system, but they're all at the top of the sphere, nothing at the bottom, I've tried various changes in the editor but can't get the bloody fishes to move from the top and be more uniformly distributed, anyone care to tell me how to do this???
TIA!!!

Injustice will be avenged.
Cofiwch Dryweryn.