There was a post on Rc, the guy said he smashed it with his fingers, he was poisoned by the thing, started to feel dizzy and had to spend a few days in the hospital.
well considering you found it on yur zoos and if it actually is a nudibranch it can potentially kill them i would just remove it to be safe...i mean even if it is a pod why take the chance
Keep an eye on your zoas. If they start disappearing, you could have a zoanthid eating nudibranch on your hands. That's my guess based on the quality of the pic (which means on dialup it's turning up pretty bad).