Please help with ID of possible pest

[jabberwock]

Maybe a Cup Coral?

 

[Saltysparky]

Maybe a Cup Coral?

That is possibly the closest thing I have seen so far. Invasive Cup Coral, doesn't seem like much I can do about them. Since they are somewhat like nems I may try aptaisia removal methods (peppermint shrimp and such).

 

[Tired]

A peppermint that eats non-aiptasia may also eat your other non-aiptasia, maybe your corals. Try Aiptasia-X.

 

[Saltysparky]

A peppermint that eats non-aiptasia may also eat your other non-aiptasia, maybe your corals. Try Aiptasia-X.

Will the Aiptasia-x work on the one near the base of the frag? I haven't done research on using it on or near corals.

 

[Tired]

Yes. It only harms whatever you put it directly on, so as long as you shut off the pumps to prevent it getting blown around, it won't touch anything else.