they never get the chance, I put my nori on a clip, the yellow tang, naso tang, lawnmower blennie and the coral beauty all watch from behind rocks and as soon as the hood goes back down, the feeding frenzy starts, the green chromis join in and the copperband watches in amazement - he doesn't touch the nori. So even if the nassarius snails found out it was there, it would be long gone before they got there - I have found the odd turbo on it though.
