ID spot on clownfish

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Hi guys, after a long time following only, this is my first message here.
What is the white triangular/starry-shaped spot on my male clownfish? Ich? Lympho? Scar/cyst? I noticed it yesterday and it did not grow or multiply so far. He is behaving normally, eating heartily - the female is actually laying eggs right now and he is doing his job (in the pictures taken two hours ago he is cleaning up the nest). Had them for three years, no issues so far. No recent additions.

Thanks for your support!

 

[MnFish1]

It looks like an injury to me. If it is not worsening or changing and no other symptoms, I would observe it.

 

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It looks like an injury to me. If it is not worsening or changing and no other symptoms, I would observe it.

Thank you!

 

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For future reference, I confirm that it must have been an injury. Three days after, the spot is still visible but much less evident - and still that one only.