Does this look like bite marks to you?

[FishyFishy!]

I recently added a matted filefish to the tank to take care or some minor aiptasia. But since then my slimer has what looks to be little bite marks. What do you think? I have not witnessed him touching corals, but I think they are far more active at night.

[DKoKoMan]

Are any of your other corals looking similar or is it primarily the green skimmer?

[adam84]

The polyps still look intact, have you lost flow in that area of the tank recently?

[tang daddy]

Dip it to be sure... if not worms then the coral will heal even with bites from fish...

My friend had a orange spot file fish in his sps tank and while no polyps were out the colours on his sps was intense...especially the Millepora species.

[FishyFishy!]

No. Flow is still excellent. All other corals look just fine and normal. I brought this frag up from a 1 inch piece, no issues. So I dont think this would be pests.

BUT in better news....I came home at lunch today to see the filefish nibbling at it. So I finally witnessed it. I will catch him asap.

[Bblinks]

I have seen them suckling on polyps before so look for spots that are missing polyps then for sure it's eating it.