So today i looked in my tank at night with a flashlight and suddenly i saw a worm thing right beside my live rock.Unfortunately i couldn't get a pic from it because as soon as it saw the light it went away.The worm was black and retracted back to its tube when it saw the light.The tube was part of the worm and it could move.I did some reasearch and from the pictures i found i think this picture describes the worm.The only difference is that my worm was black and it out of its tube.Could it be just a peanut worm or is it something else?