Its tough to say, but I would lean towards it not being bite marks. They are usually underneath the acro and irregular. Here is a pic of what they look like so you can compare.
On that picture you can even see the worms? They are the little specks?
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Usually its almost impossible to see the worms, I think the little specks in that photo are actually polyps of the acro.
it's hard to tell by your photo best bet is to take out the acro and look for small circular bite marks on and around the base. if that is present, get something to dip your corals in like Bayer, ReVive, Lugol's. dip your corals and see if anything falls off. full grown falt worms are detectable by the naked eye, they look like small brown flakes.
Wow, that is very unfortunate! One egg gets by and a tank problem before you know it
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Looks like someone is working on the Eggs part of the problem. Hopefully it reviews good and starts hitting the stores.
heres the link. Still wont help with in tank treatment Though.
http://reefbuilders.com/2013/02/21/reef-pest-solutions-all-out-gunning-eggs-undesirable-critters/
I was just reading an article on Reef Addicts on it too, I might order some and try it out and let you guys know the outcome.