Fin damage (dartfish)

[americnjewl]

i just noticed some fin damage on one of my Magnificent Dartfish, I don't recall seeing it before. Should I be concerned? Does it require some treatment? He's otherwise normal....

 

[Sharkbait19]

It could be a sign of aggression - I would keep an eye out for any further damage or if the wound gets infected, but it should heal up fine.