White baby polyps on glass: aiptasia, coral?

I noticed a few of these on the glass of my aquarium. As the days go on, there seems to be one more of them. We don’t have much aiptasia in the tank anymore (for a long time now), save for maybe 3 noticeable ones that are hard to reach in the back. Maybe they reproduced and these are the result? Or are these possible coral polyps? Sorry for asking so many questions…I like knowing what’s going on. I’d be happy if they were some sort of coral. See the pics below. Thanks.

Picture 1.

Picture 2.

Picture 3.

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White baby polyps on glass: aiptasia, coral?

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