Transparent centipede

I do not have a picture which might make this hard but I will try anyways. I found crawling around on my glass a transparent centipede, many many legs and little antennae. It was pretty transparent with a brown or dark colored tube in the middle that moved around. Maybe 1/2 an inch long. I tried to get the camera but it went in the sand bed...lost forever. Anybody know what that could be? The only color was the inside of it, which was dark, the rest was clear.

 

Perhaps a baby bristleworm?

 

Yeah, I was just about to suggest a bristle worm. That's the only centipede like critter I know, and they are very common.

Be careful not to touch him!

 

You might try and google Tanaidaceans and see if it could possibly be that as well. I have a couple in my tank as well. This is one of the fun parts, researching...