top is not that's just a harmless filter feeder.....bottom I think is for sure. Green tint kind makes me wonder though they aren't usually green. At least the 3 in my sump aren't anyways.
I thought the top one might be some sort of filter feeder, I have a whole slew of red feather dusters and such, but wasn't sure. Bottom one I'm almost 100% sure is aiptasia.
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