It's too small to be sure, but I would guess 8 per stalk


In the second pic you can see a regular size zoa polyp above it for perspective.

The gono I have from ace almost looks like zoas, the tentacles are so short. It's a small frag, encrusting. I don't see any similarities to this hitch hiker. Sorry no pic of the frag, but it just looks like purple/blue zoas.

Popping up out of nowhere like this I'd think it was some softy, but that base sure looks like a skeleton.