I am looking at getting 2 female dalmatian mollies for a community tank, as I know males can fight each other, but I also dont want any fry! So I was wondering if two female mollies would fight each other?
The females may get aggressive when close to giving birth also, you said you don't any fry? Most,mollies are already pregnant when you get them from the store, 1 contact with a male can keep the female pregnant for months, you shouldn't be confused when you see fry in the tank as your molly is probably already pregnant.
If you want virgin mollies do what I do and ask your pet shop for some baby fish (Assuming your pet shop does what mine does and puts gravid fish in a breeding trap) and rear them and as males develop take them out return them to the seller.
I almost ALWAYS get a litter of fry from a female molly from the LFS LOL. Honestly, why keep 2 females, when you can keep 1 male with a super tall flashy fin!?
Oh to add to what you originally asked, female mollies are not really aggressive. I have seen males fight pretty good, but have never witnessed a female scuffle in my tanks, and I keep ALOT of mollies.
What else is in the tank? My female mollies provide a nice occasional meal for my green spotted puffers when they give birth, the cyle of life!