Hi, Sw_Addicted-
What you have found is most probably the larval reproductive stage of some kind of polychaete, called an epitoke.
it could be from any number of polychaetes, some kind of bristleworm or even a feather duster. In all probability it is totally harmless anyway.
Good Luck!
-Becca
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240 gallon glass mixed reef 2x 250 watt m.h., 2x 175 watt m.h., 3x 110 watt vho's.
55 gallon propagation tank, 2x 96 watt pc's
Empty 125 gallon tank
reefer girrrl!