Question about a Starfish.

It is a red and white Tile Sea Star. My water temp is 77, Ph is 8 and my Salinity is 1.025. I will check my nitrates. It stays on the glass. I put it in the sand and it just goes right back to the glass. I will see if it will take some food. Not sure how to do it, with it plastered to the glass.
 
It looks healthy and it moves along the glass. I have no aggressive fish and I have not seen any of them bothering it or even coming close to it. I do not see any discoloration. I guess I will play the wait/watch and see.
 
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