Help ID please? Bug

Zooanthid eating nudibranch https://www.google.com/imgres?imgurl=https%3A%2F%2Fi.pinimg.com%2F736x%2Faf%2F47%2Fbc%2Faf47bc94612cd739e07464a5c7beba8f--tank.jpg&imgrefurl=https%3A%2F%2Fwww.pinterest.com%2Fchewdoggie%2Freef-tank-pests%2F&docid=A00QN1TIDklI-M&tbnid=vEkPmLukyTPARM%3A&vet=10ahUKEwjk4oK1-5nXAhXm7YMKHVQgBlI4ZBAzCDsoMzAz..i&w=736&h=552&client=ms-android-hms-tmobile-us&bih=576&biw=360&q=saltwater%20aquarium%20bug&ved=0ahUKEwjk4oK1-5nXAhXm7YMKHVQgBlI4ZBAzCDsoMzAz&iact=mrc&uact=8
 
I'm not willing to call it zoa eating vs. monti eating from that picture, but it doesn't look like an aiptasia eating one.  I would remove it and start a frequent search for more along with their eggs.  Don't crush it by hand (palytoxin is real), suck it out with airline tubing or a cut off pipette.Additional edit, while I still don't think it looks like an aiptasia eating one (berghia), is it safe to assume that you have not intentionally added any berghia lately?
 
I had the monti eating ones and they looked much whiter than the one in the picture, but I know pictures can lie!  I also never saw them on anything other than monti and they would consume it very quickly.
 
Zoanthid nudis are white clear when they are starving. This was on the glass. My montis are growing strong my zoas seem to close up for no reason after having looked very strong the day before. Salifert worm exit was the recommended cure.
 
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