If its not pest could it be fish?

[Treed]

Iv been seeing some bite marks on some of my SPS but there not small like AEFW bites would be. Iv dipping the rock with the acro that had bite marks and nothing came off. So Im thinking maybe one of my fish are doing it. Im going to make a list of my fish and maybe someone could fill me in that one of the fish may be biting the corals.
-Yellow Tang
-Scopus Tank
-Clown Tang
-Sailfin Tang
-Tomesis Tang
-Melanarus Wrasse
-Cleaner Wrasse
-Leopard Wrasse
-Stary Blenny
-2 Banner Cardinal
-10 Green Chromis
-Chalk Bass
-Black Spot Angel
-Black Clownfish
-Bartlets Anthais
-Royal Gramma
Also have a royal urcine,2 cleaner shrimp and 1 emarld crab.
All parameters are in line and phos is 0 and Nitrate is 3.
Hopefully someone can help me out! Thanks

 

[Green_Reefer]

I'm tearing out my rock-work tomorrow morning to move my rusty and flameback angels to the 100g sump for destroying SPS and keeping my gorgonian closed up. Took me a few months to figure it out it was the angels and not just my inexperience that was keeping me from killing SPS.

 

[nolanrob123]

Do you have any pics? How are the "bite marks" situated? Are they together in groups, random, high up, maybe out of reach of certain crabs?

 

[Treed]

Im on vaction now so I wont be home for another week. Im hoping it doesnt get worst while im gone