Need Help ID - Acropora Eating Nudibranchs?

[acrocapital]

I found two of these on the glass today, and I believe they might be Phestilla Arnoldi. If anyone has any insights or suggestions on what they could be, I would greatly appreciate it. Additionally, any simple removal methods would be very helpful. Thank you!

 

[MoshJosh]

I am not an expert but those do look like acropora/montipora eating nudibranchs:

Montipora eating nudibranch ID, treatment, and prevention

Identification: Montipora Eating Nudibranches are a fairly common aquarium pest that will feed on any montipora species and even some others like select chalices, scrolls etc. There are over 2000 known species of Nudibranchs and all of them have very select diets. They were each put on this...

www.reef2reef.com

Acropora Eating Nudibranches!!!!

Hi guys! I have not seen much information about Acropora Eating Nudibranches, and wanted to share a few pics of what I found. I must have missed some eggs when I dipped and ended up with these guys on most of my new Acropora frags. I have attempted to pull the frags and dip every 4 days...

www.reef2reef.com

 

[ISpeakForTheSeas]

Yeah, those do seem to be a Phestilla species of some kind - corallivores, so you don't want to keep them; they typically go for SPS, with some species going for Gonis, Alveopora, Cup Corals, etc. (one kind I know goes for a specific kind of hydroid, but it's not your species).