In taking down our 300, we discovered 3 large worms. Two are like this one (believe it to be a bobbitt). As you can see, it is nearly 3' long. We have put all 3 in our QT tank for now in case there is any interest in someone having them in a species tank. If anyone is interested in them, consider them yours. We will likely dispose of them in a few days if there is no interest. The other kind of worm actually broke in half so the pic below is only half of it (total length at 16"+). Is it a large bristle worm?