I suggest anyone who has nudis get a colony of yellow zoa's. They will all migrate toward them and chow down, making it easier to target them. I noticed on a multi-rock I got a week or so ago, one by one, the yellow zoa's were closing up, then withering away. I chalked up the first 2 or 3 to stress, but noticed tonight one that looked exceptionally good had closed up. I flipped off the light and looked, and 30 seconds later nudis were all over the yellow zoa's.
So after a freshwater dip, and several dozen dead nudi's later, I havent spotted any moving in around 10 minutes. I'm sure there are more, and eggs as well. But I think I got a large portion of them tonight.
here's a fat, dead one , I hope chowing down on a few zoa's was worth the freshwater hell I sent him to: