Is this a baby Duncan?

[SaltyMcBubble]

I found this growing in my substrate about a week ago. I started to remove it with a turkey baster sucked it up not knowing what it was then shot it back out, to see what it grows into. Now it’s starting to look like my Duncan. It’s about a half inch and has doubled in size. Can I expect to find more? Is this caused by me running a lunar cycle?

This is Duncan below

 

[KrisReef]

That would be a zoanthid or something similar, not a Duncan on the gravel.