Disease or aggression wounds

[pj wags]

Noticed this on my Blue Tang. Lots of rings looks like scapel wounds. Tangs been kept in same tank for 1yr now going off on each other noticed alot of aggression among themselves. Thinking this is just aggression wearing it down

 

[EmdeReef]

Could be aggression. Any chance you could post close ups? Any redness around wounds?

 

[LAReefer4Life]

Sounds like aggression. Do both tangs have these rings? How big is your tank? Has their behavior changed since you've noticed the issue? such as appetite, activity, etc...

 

[vetteguy53081]

Looks like healing from wounds. Would not hurt to add a little MELAFIX by API products. Will help healing and prevent infection.