I was relaxing, having breakfast, staring at my tank calmly enjoying my morning and admiring the new Xenia I brought home yesterday... when all of a sudden this white THING comes shooting out of the rock and starts zipping around all over the tank. I mean clearly free swimming and really fast. It's about an inch and a half long. I got lucky and managed to catch it and take some pictures. On closer inspection it's clearly some type of worm, segmented and with two very prominent eyes. It has two distinct sections, a sort of head/body section and a sort of tail section. It swims with an eel like motion, with the hair like things rippling along the side of the tail section. I've attached photos for your enjoyment (2 when it stopped swimming in circles for just a brief second and you can sort of see the swimming motion in the third). Can someone please please tell me what on earth this is, if it's something I should worry about, if I'm going to see more of these erupting out of my rock etc? I've got the serious heebie jeebies! Thanks!
