Swimming Bristle worm?

ok so im freaked out...i dont have a picture of this but yesterday i saw some thing work-like and mabie 2 to 3 inches long free swimming FAST the in water...It saw around the tank bumping into stuff then eventually went into the rock work...do bristle worms swim? I really dont understand how ive never seen this thing its not small...has anyone seen a bristle work swim quite fast through the water????? It looked white or light tan in color any ideas? sry no pic

 

I haven't ever heard of a BW swimming. However, it could have gotten blown off of a rock by the current and carried by it until it found a rock again. Otherwise, I haven't the foggiest.

 

hmmmm i know im stumped man thanks tho!

 

Sounds exactly like this nasty piece of business I had in my tank until he made a wrong turn into my overflow.... ID'd as a "swarmer" - reproductive phase of a bristle worm.... check it out...

http://www.3reef.com/forums/id/lightening-fast-worm-id-56510.html

 

Bristleworms do swim when threatened.