they might not have hatched yet who knows but that is a nudie maybe you got super lucky and only had one. I sure hope so for your sake but I doubt it I would get a red flash light and start scanning my tank every night and in the day pulling corals ad looking for eggs. you wanted to know what it was hence posting the picture and we are telling you what we think it is s its now your choice to do something about it seems more like you want us to tell you its not a nudie and don't worry about it and that would be irresponsible on our part. in no way am I trying to be mean just telling you like it is to help you save your corals.
And i Thank you for all your opinions., I'm not trying to fight it or disagree I'm just stating what i have found. Are there any nudi's that aren't bad? Lol
Again i thank u all for the information. I'll keep this thread updated.