Why do seperate batches of molly fry school with their own batch?

fIsHy13

not a troll
Oct 5, 2005
392
0
0
My mollies recently had babies. I have put them into a new tank that I've properly set up. The babes are from two different mothers, and it interests me that all the white babies school together, and the dark ones just swim around the tank like loners. Why is this?
 
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