Coral goby on a Pillow starfish

The Pillow starfish in Okinawa is very colorful and on which often live tiny shrimps.But we don't see gobies on it.
When I dove at night I stumble upon a Coral goby on a Pillow starfish.Coral gobies usually live among the branches of acropora corals.But during the night,sometimes I can see them out.
At that time,it was not shy.Perhaps it was sleepy.So I could get this photo

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