Male Mollie aggression

[Pleky plec]

Ok so today I went to PetSmart and got 2 Dalmatian mollies, and 3 neon tetras and 1 guppy. Well the male Mollie ended up killing the neons while they were in the bag and while I was still in the store. So the fish person took out the dead neons and left the two mollies and guppy in the bag. The male ended up killing the female on the way home. So all I got out of it was 2 fish. So my question is. Will the male mollie kill off the rest of the fish in my aquarium? And are they all aggressive like that?

 

[Scottyhorse]

He could if he is that agressive.. What other fish do you have in your aquarium?

 

[Pleky plec]

He could if he is that agressive.. What other fish do you have in your aquarium?

I have 3 guppies, Plecostomus, 2xray tetras

 

[Pleky plec]

He could if he is that agressive.. What other fish do you have in your aquarium?

I also have a goldfish