Help identifying this problem golden barb

[andrew ritch]

 

[LyraGuppi]

It looks like an injury, do you have any sharp points or edges in your tank? What are the other fish in this tank?

 

[bettamen20]

Looks like he got into a tough fight

 

[DoubleDutch]

Hoe big is the tank Andrew

Verstuurd vanaf mijn SM-G925F met Tapatalk

 

[slayer5590]

I'm going to go out on a limb here and say the most likely culprit is right behind it in your picture.