Saw the bristleworm again!

Today, it appeared for a brief moment, while I was showing the tank to my friend Walter.  Grabbed a camera, got some handheld shots, all terrible, of which the less worse was this one:

The worm is the orange thing in the middle of the picture.  Shortly after, it disappeared into the rock crevices again....

You can see the colors the live rock has acquired in this picture, two dark red spots appear in the right hand side of the picture.  Coraline algae, I presume....