Chromis fighting

[jmoney7]

I have 4 blue green chromis in a 50 gallon cube. They are all eating fine and I’ve seen minor aggression between them especially more at night but when I was feeding today I saw some cuts on one of their tail. What could this be about? Should I be concerned?

 

[Ben.QLD2]

I can't see anything in the photos, but it sounds like normal, nasty chromis behaviour. It may settle, it may worsen, but they'll only be aggressive to each other.

 

[jmoney7]

It’s like a lesion in its tail it almost looks like if he got roughed up on the rocks

 

[Ben.QLD2]

It’s like a lesion in its tail it almost looks like if he got roughed up on the rocks

In the fin or before the base of the tail? I just can't see it on the photo. A white light photo would help.

 

[jmoney7]

This is better I think!

 

[Ben.QLD2]

Ok, much better photo. I am concerned about Uronema, rather than it being an injury. We're the chromis quarantined? How long have you had them?

 

[sfin52]

Cromis pick on the lowest in stature and eventually will weed out till you just have one. Unless there is a large tank

Those wounds look like uroma

 

[jmoney7]

How do I treat that? And no they were not quarantined

 

[jmoney7]

I’ve had them for 6 days

 

[Cthulukelele]

It's functionally untreatable. Feed the fish well and hope they recover with the understanding they probably wont

 

[jmoney7]

Will it affect my other fish other than my chromis?

 

[Cthulukelele]

Will it affect my other fish other than my chromis?

It almost never affects fish other than the newly added so veryyyyy unlikely, but you may eventually see lesions on the other chromis

 

[Cthulukelele]

Removing the one with lesions won't help

 

[jmoney7]

dang that is butt I thought chromis were hardy and non violent fish.

 

[Cthulukelele]

dang that is butt I thought chromis were hardy and non violent fish.

They're fairly hardy, but they're prone to uronema. Outside that a hardy fairly peaceful fish.

 

[Ben.QLD2]

They are hardy, and peaceful to other species, but prone to Uronema and should be quarantined like all fish.

 

[sfin52]

It almost never affects fish other than the newly added so veryyyyy unlikely, but you may eventually see lesions on the other chromis

Clowns are at a high risk

 

[jmoney7]

Everything I’ve read online is that they fight with each other until there is no more left. This was after I got them.

 

[Seansea]

Peaceful with anything but other chromis. There will be just one left in a few months. Do most of their damage at night when trying to hide together. I have tried a couole times to add grouos but always end uo with one.

 

[Borat]

dang that is butt I thought chromis were hardy and non violent fish.

They only like to kill each other.. as people said - they will single out each other one at a time until only one fish is left.