hitchhiker nem

This came on a zoa rock, zoas arent open atm so its hard to compare. I suspect its some sort of anemone, might be a majano but there are so many types of majanos. Wondering what it might be.

Recently discovered two of these guys in my tank. Must've come in on a frag (despite dipping) or maybe a snail. Kinda looks like a ball anemone but I can't tell. The two I have are in darker areas and mostly clear with a little color under blues. Tentacles radiate evenly around the mouth plate...