In my fish tank. Must have come as a hitchhiker with the live rock a year and a half ago and grown ever since then. It's a 7" Bristleworm. I hear if you touch them it's like a hundred bees stinging you. I'm told it poses no risk to my fish so I'm just going to let it stay. Taken with my D80 and a Tamron 70-300mm with the macro feature turned on. I used a tripod on top of my couch too for what that's worth.