Hi. I'm still just starting out. I got this setup used but don't think it really had any corals living in it. I just noticed this stuff today which I didn't notice before but maybe I just missed it. To my newbie eyes I'm guessing it's some baby tentacley coral, tho I'm not sure what it would be if so. Either way I was wondering if anyone could confirm anything about what I'm looking at. I mostly want to just verify that it's not the spawn of some pest that I should be getting rid of. 2nd pic for scale. Thanks.