? ID Something Swimming in the Tank (not a fish) (Pic)

[WhiteCloud]

I caught something new, guessing that it came from my Live Rock. I have never seen it before tonight.

I have a bad picture, but perhaps the description will help more:

Wormlike, 1 inch long, swimming like an eel, White body with a redish tail, and a black knobby end to it. I would swim with the current, then the head part would stick to the substrate while the tail continues to wiggle. It moved very fast and wiggled rapidly. It was out at night under the lunar lights.

Here is a bad picture of a time it landed in the substrate for 30 seconds or so:

 

[electrikat]

Are you sure it's not some kind of goby or blenny? Picture is definitely bad but it is shaped like my bicolor blenny and yellow watchman goby.

 

[Brad]

Yup, I know what you mean. I've seen the same thing....always just after the lights go out. No idea what it is.