One White Mark clownfish

[Demoic]

Hi my clownfish suddenly had one white mark on him. No one new had been introduced in awhile and not sure what to think of it. Hoping someone can give me an idea if it's anything to worry about.

 

[Sharkbait19]

Looks like an injury - what tankmates does it have?

 

[Demoic]

I have the 2 clowns, 3 yellowtail damsels, 1 sixline wrase, and a coral beauty dwarf angel for fish. Also have an cleaner shrimp, emerald crab and porcelain crab outside of the regular snails and hermits.

 

[threebuoys]

Injury or grain of sand perhaps. Observe closely for a few days. If the mark remains and if it appears inflamed/infected, be prepared to treat with Kanaplex or Maracyn or similar anti-bacterial.

 

[Sharkbait19]

I would think the other clown caused it in a fight, monitor for further aggression and signs of infection, but it should heal up fine.