Yeah, it's pretty impossible to tell from that photo. But giving it a shot in the dark, if you're talking about the stick-like thing on the top most polyp, it kinda looks like fish poop to me.
It did appear to be just some type of waste I guess I just get alarmed too easily. It blew right off with a turkey baster. I don't usually see this type of thing as I have plenty of flow in the tank. Thanks for having a look.
It may not have been blown off with the regular water flow because the coral may have been "holding on" to it. Sometimes corals eat fish poo... or think it's food.