Do Black Mollies Fight

[gmanova]

I have 4 Black mollies and 4 White mollies in a 46 gal. That's it! I pulled a Black Molly out last night. Dead! It looked like his Dorsal fin and Tail fin had been eaten at. Today I noticed 2 Black mollies go at it for a few seconds. Is there a bully in my tank?

 

[BrackAttack]

for me its common for mollies in general to be little pain in the butts. i have always had aggressive mollies.

 

[gmanova]

Yes, but can they kill one another as it seems in this case? I just thought the molly got sick!