ID on tiny purple with white spots snail/slug guys.

[~_~]

I was looking around my aquarium, and I noticed about 5 of these little snail/slug guys on my button polyps.

 

All of them are purple with faint white spots on them, and there about 0.5mm or less in size.

 

I don't have a Digital camera, so this pic is from a video capture...

 

Here is the 2MB mpeg1 video of one of them

 

I was thinking they might be baby stomatella (dunno how baby stoms look though)...Although these guys don't have as much of that slug-like look, and there all the same color.

 

:x My button polyps seem like there trying to eat them to...

Damn white tube stuff all over the polyps base to >.<

[chufa]

Could be some type of limpet (solif shell) or chiton (segmented shell)