String looking thing hanging on Tang...

Hello all..
I was wondering if anyone knows if this is a parasite or not? I have a Yellow tang and It has a little reddish brown looking string like thing hanging from his tail just above the spike if not right next to it. Is this some type of worm parasite? It has been there for a few days and has not seemed to move. It does not look like a anchor worm, But Im not sure so any info would help. Thanks :(
 
trey thanks for the info. I am happy to say that it cleared up so Im not sure what it was but its gone so thats good.. Thanks. :D
 
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