I have two 2+ years old Ocellaris
clowns living in a huge Sarcophyton
in my 250 g tank. Tank is two and a half years old containing mainly softies, shrimps, hermits, snails and some other fishes (blue tang, yellow tang, maroon clown, six-line wrasse, blue damsel, pajama cardinals). All water parameters are stable and excellent.
Two months ago I noticed that both of my clowns got black dots all over their body and fins. No other signs of illness, they are eating good and swimming and behaving as usual.
Could you please ID
what's going on with them?
More dotted pictures available here