Good guy or bad guy?

I have found what look like super tiny brittle stars in my tank. Are these hitchhikers good or bad? I will attempt to attach a photo next.

 

photo

 

I have researched online and learned more about Ophiuroids. Looks like we have mini brittle stars and that they're reef safe and even beneficial. But please let me know if anyone has other thoughts~

 

I have a lot of them in both my tanks. Beneficial members of the clean up crew.

 

Thanks! Appreciate the info~