Could this be eating my zoanthids?

[Rendos]

I dipped a zoa colony today in RO, and Lugol's Solution. This is what came out...
http://www.smugmug.com/photos/256085453_wAwbQ-O-1.jpg

The area that these came out of has been having some zoa's missing lately.

[killingseed]

the one on the left looks like it, but i am not a 100%. what does its trap door look like?

the one on the right is a collonista snail for sure reef save.

[pdash]

The one on the left is a sundial snail i think, and it will eat zoas. Not sure about the one on the right.

[Pufferpunk]

Correct--left one bad snail, right one good snail.

[tygger]

Where do these things hide in the zoas? Would I find them casually eating the zoas in plain view or would they be eating from the bottom, underneath the polyp out of plain view?

[Indermark]

Every sundial snail I have came across I noticed when I un bagged the colony of zoas before I placed it in a 5 gallon bucket. Since all the polyps are closed it makes it easier to locate the snails. Try at night with a flashlight with or without a red filter.

[ct_vol]

Rendos~ As killingseed referred to, the trap on a Sundial snail is conical instead of flat... That is the easiest way to distinguish between a small Sundial and a Collonista... Jub Jub In general adult Sundials are larger than Collonista as well... Here are some good pics...

http://www.zoaid.com/index.php?module=Gallery2&g2_itemId=424

[Chriskid]

Oh geez! I have to worry about zoo eating SNAILS too!

[NanoReefWanabe]

<a href=showthread.php?s=&postid=11978151#post11978151 target=_blank>Originally posted</a> by Chriskid
Oh geez! I have to worry about zoo eating SNAILS too!

LOL yup...spiders, nudies, and snails.....and supposedly amphipods too...