Could anyone help me ID these?

[BuckyT8411]

I have these in a tank I recently purchased. They really do no not provide any pop or nice colors under any light spectrum. I’m thinking button polys?

 

[Sharkbait19]

Button polyp could refer to any zoa/paly - so yes they are one.
As for specifics, they could be Mohawks, but those are usually more reddish. Mine don’t really glow well either.
If they are, they will grow very fast, so keep an eye on nearby corals. I’ve had to move a lot around as mine spread.

 

[encrustingacro]

Zoanthus cf vietnamensis