Clownfish in trouble ?

[bobonakamoto]

Hi fellow reefers. So I notice today that my clownfish has black patches on him. I have another clownfish which hasn’t been affected. All fish looks healthy and eating.
Attached are pictures of the clownfish in question,

What is this ?

 

[The Aquatic Arsenal]

What kind of coral do you have? I see zoas and mushrooms.

 

[Fishy212]

+1 Looks like some kind of injury

 

[bobonakamoto]

It’s been rubbing itself religiously on the zoas

 

[James M]

It’s from the zoas stings. I wouldn’t worry about it

 

[bobonakamoto]

It’s from the zoas stings. I wouldn’t worry about it

Hmmm was thinking are immune but I guess those are some strong Zoas

 

[Tahoe61]

Hypermelenization