Fish Living inside Acro? Good or bad?

[carrillowilliam]

I was closing looking at one of my colony's and i noticed a tiny fish jumping from branch to branch. Totally surprised me the colony is about 8 inches by 7 inches pretty big. Any idea on what type of fish this is ? is it good or bad?

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[Peter Eichler]

It's a goby from the Gobiodon genus or possibly Eviota. They will nip at their hosts sometimes, so keep an eye out for any distress or recession with that coral.