Do any snails eat zoas?

[Nevin]

I put two little rocks with zoas in my nano last night and noticed that my unidentified hitchhiker snail rushed over to it as soon as the lights went out. I segregated the snail in case it damages the zoas.

Are any snails capable of hurting zoas? Would it be poisoned if it tried? The snail is about 1/2 inch long, black and yellow. I thought it might be a bumble bee snail because of the colours, but from the pictures I've seen their stripes are more regular.

Regards,
Nevin