Have you seen them? I found them on my corals super early in the morning before any lights came on. They were all lined up along the edge. I hope it's not, because they are not fun to battle. I lost most of my montis while trying to isolate, qt, and treat.
Yes I have see them. But those marks are not like the ones of the nudi. I say this because usually they go from a edge eating it... So you see a big white patch that usually starts to increase in size.
What are your parameters? That is going to be the first things the bigger brains want to know when they get off work and start answering questions. Might as well pre-empt it.