What keeps eating my ZOAS?

[SoLiD]

The small one is a Collonista Sp. snail. They are "good" little algae eaters and one of the few snails that will breed and multiply in our tanks without user intervention.

Wet Web Media

[350gt]

The bigger snail looks like a tulip. not good to have. On another note, I recently banished my Beau Gregory damsel to my sump for ripping some of my corals off the rocks, including zoas. He had been fine for a year, then turned into a jerk. Hope you find the problem soon.

Lol, poor damsel banished. I have a three striped damsel in my fuge cause he's a douche, mean for no reason.. I doubt it's any of my fish, only cause the ones on my racks are fine. It's when I try to put them on the rock work they vanish and only over night. Thinking about setting up a camera taking timed shots with a test frag like someone previously said to try.

[350gt]

The small one is a Collonista Sp. snail. They are "good" little algae eaters and one of the few snails that will breed and multiply in our tanks without user intervention.

Wet Web Media

I sure do hope so. I took three out this morning and will inspect them later today, if they stay in the jar I put them in.

[dipan]

The bigger snail looks a lot like the zig zag periwinkles that I got from reefcleaners, but the periwinkles are very small and listed as reef safe: