Snails releasing yellow stuff?

[willdelpok]

My snails released some yellow stuff, not sure what it is. This yellow has gotten on my live rock and on top of my snails, what is this?

 

[michaeltx]

hard to say is there are they actinf funny not moving anything like that. it might just a secretion or it might be first signs of trouble I persoannly havent seen a yelloq discharge out of any of my snails.
mike