Why do Dalmation Mollies turn black?
Furthermore, why is my white Molly turning black?
Quite often they'll turn a dull grey color if not given adequate light, or none. Could very well be a slime coat issue like another said, without it, or with damage to it, it opens them up to parasites that'd otherwise be no problem. Mollies prefer brackish water settings, but can thrive in a properly cared for tank.
Secondly, why are my mollies aggressive? There are many reasons for the mollies to chase each other. Predominantly, a male molly might chase its female counterpart to mate. A male molly may also become aggressive with the other male population in the tank to mark its territory or for the attention of females present in the aquarium.
Besides, do Dalmation Mollies change color?
Yes-i've been breeding dalmation mollies for a long time and the vast majority of fry will start white and darken to 50%.
Can Dalmation Mollies be aggressive?
Aggressive Dalmatian Molly. My Dalmatian Molly has recently become aggressive to all the other fish in the tank. There's a good chance she could be pregnant and most of the time when fish become pregnant they get aggressive.