Yep.. Your ID is correct..
No need to bother with either IMO..
They are fine.. just leave them..
There is supposedly 1 type of asterina that "can" cause problems.. But IMO.. they are just another beneficial creature.. If you notice problems (eating coral) then you can simply remove it.. with your hands or whatever..
I've had thousands of them in many tanks for years and never had a single problem..
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