Aiptasia?

[pochitafish]

Is this Aiptasia or something else?

 

[willygwak2]

I’m not great at identifying pests but it definitely does look like some sort of anemone pest

 

[BonnieB]

While it could be, I was thinking spaghetti worm because there are long, kind of shiny, noodle like tentacles whereas aptasia have shorter tentacles and stalk. Spaghetti worms bury a good part of their body though making me less positive as I type so wait for one of the ReefSquad to give you a positive id!