Molly Fish Aggression/companian

HI everyone, I have a 20 gallon tank with some tetras, guppies, and a single female molly. There are several artificial plants, and a cave in the corner. My molly likes to hang in the cave, and recently I’ve noticed that she’s been chasing other fish out. Is this normal behavior? Could she be pregnant? Should I get her a companion or 2?

 

Are there male AND female guppies???

 

Are there male AND female guppies???

Just male

 

Sonce they are just male guppies, they are probably being too aggressive towards the molly, being that she is the only female fish that they could potentially mate with. So she probably hides because of the aggression of three male guppies. I would still suggest the 2 females for every one male in this scenario even though they can’t breed, for aggression.

 

Sonce they are just male guppies, they are probably being too aggressive towards the molly, being that she is the only female fish that they could potentially mate with. So she probably hides because of the aggression of three male guppies. I would still suggest the 2 females for every one male in this scenario even though they can’t breed, for aggression.

I got her 2 fellow mollies (1 Male 1 female) and now she’s stopped chasing fish. I haven’t noticed any aggression since.