If the fronds look fuzzy its probably some kinda GSP. If you see any kinda "matting" then Id practically guarantee GSP, but on stray polyps there may be none. If you can make out some type of small oral disk (which it doesnt look like) then maybe you could say aiptasia, but if you touch them they will dissapear into the rock, an easy enough test
I have some vry small ones (aiptaisa) and they do indeed look similar but I beleive mine have an obv. plateau or disk at the base of the tentacles. Anyways toch/ disturb them, if they retract then it's a very good chance it is a pest anemone (not nec aptasia though) maybe mahano or somethin else