Xanthide? Crab I Found at Night. Keep or Not?

LorenzoE

New member
So I found this guy in my tank after looking through it with a red light at night. He was just eating algae by the looks of it. The tank has only been running for a week and a half so the only coral I have is what seems to be a single button polyp that came with the live rock, and so far he's been left alone.
So should I remove this guy or give him a chance? I think he's pretty cool so if it's a 50/50 sort of thing I'll definitely keep him. Thanks and sorry for the poor image quality.
 

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