I'm rearranging my Moonlight and I spot a huge snail spewing a cloud of milky fluid. What's up with that? Last week I tried pulling him off a rock but it was so strong that I was picking up a 5 lb rock doing so. I gave up. This time he was in the waving hand and I was able to pick him up. Any Idea if it's OK to let him keep spewing? It's pretty big. On the glass I would say it's the size of a quarter.