is this a good thing?

[xahx]

this clown goby is sitting on my acro, is this bad?

 

[TCTFish]

No, it is not bad. In fact clown gobies are very much at home among the SPS coral. Usually staghorn and similar species such as acropora.

 

[lando]

Very normal for this fish to "perch" on various corals. Great shot by the way