Manjano?

I found this guy in my fuge on some macro algae I just purchased. I assume it's a manjano, but don't keep mens so I am unsure.
 
Not much until a couple cells tear free, wash through the return pump to the display tank, then end up all over your base rock where you can never get rid of them. I'd scoop it out along with the piece of macro it is attached to. I would also look around for others.
 
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