Male Guppy Aggression

[jillianfaith]

I have a 55 gallon that had 6 male guppies with 9 Cory cats. Last night, I unfortunately lost one of my guppies due to one of its fins being torn off. I’ve always seen them pushing each other around but never nipping. I really don’t want females because of the babies and I’m not sure if that will even fix the problem. Does anyone have any recommendations as to what I should do? I’m thinking about taking back the two aggressive males but is it safe to have an all male tank?

 

[WinterSoldier.]

I have had this problem too. I think that its a little hard to keep them from fighting. I would just let it go

 

[Merilial]

Some people have great luck keeping males. I ended up with a trio of boys I enjoyed, but one was hyperaggressive and killed one tankmate. If you notice any individuals being excessively aggressive, return them if you can.

I am curious though, what's your tank set up like? In my current community tank I've seen much less aggression with several heavily decorated/planted spots to break up the fishs' line of sight.

 

[Violet Rein]

I had a bully once, he thought he was great because he was much bigger than the other boys. I added a bigger one, he stopped lol.

 

[Merilial]

Also -- I noticed with my guppies that the boy that got picked on the most had a very large full tail. The other two had delta style fins, and were slightly faster and had less to bite than my blue guppy. Other than my trio, I don't have any guppy experience though, so I'm not sure if this is something more experienced hobbyists have noticed.