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[CherylMcKay]

I have had the coral for about 8 months and the rock it is on for the last couple of years. This is the first time I have seen this worm. He doesn't seemed to have hurt anything, but knowing what it is will help me keep an eye out for any damage.

I have attached a couple of pictures. It looks like it has a fringed head/mouth and was picking off the rock...

[bvlester]

looks to be a peanut worm maybe. does it have legs can not tell from pics.

[CherylMcKay]

looks to be a peanut worm maybe. does it have legs can not tell from pics.
I didn't see any legs and he streched out fairly far.

[Kabong]

I'll second peanut worm

[hillegom]

I'll second peanut worm

+1 harmless