Bobbit can grown upto 3m,in the tank they normally live in the rock and the only signs they are there, are fish or clean up crew go missing. They anchor their tail inside the rock and wil retreat at lightning speed. You can sometimes see a round hole in the rock. They tend to be nocturnal so unless you are looking at night using a red light you probably won't ever see them. Have nice dreams you all ???
Just managed to watch the video, I have seen smaller worms like that on the coast where I live but nothing that large. I would be tempted to setup an aquarium just for it, that is if I maintained salt water tanks. Thanks for sharing.