Advertisement Mine is both! Lives in a vertical web that extends into the substrate and runs horizontally. It is L shaped with the horizontal part extending daily. I have noticed that the OBT atacks quicker and eats more when the roach enters from the bottom, but it will still take a roach from the forceps thru the feeding door directly over the top opening of the web. In the looking-down shot, it was there then the camera scared it down to the corner where its outta sight from any angle . . . sorry, but cool web, huh?