Black spots on clown?

[Kenny’s Nano Reef]

Anyone know what these back spots could be?

 

[Gareth elliott]

Looks like he tried to host something and got some stings. Any anemones or euphylia in your tank?

 

[Kenny’s Nano Reef]

Not

Looks like he tried to host something and got some stings. Any anemones or euphylia in your tank?

Not at this time. I used to but when I did the spots were not there

 

[vetteguy53081]

Agreed. Stung by anemone or other coral in attempt to host it.
You can add some Prazipro to tank as clown is likely lightly stressed from sting and it should recover in a few days

 

[Gareth elliott]

Zoanthids can do this too, clowns sometimes will try to host anything. Mine would host sheets of algae during a cyano outbreak.