The maw with which a phantom fungus attacks prey is lined with row upon row of sharp, jagged teeth that resemble pointed rocks more than actual fangs. This "mouth" is not used to feed, however, and does not attach to a digestive tract-it is nothing more than a gaping natural weapon. When a phantom fungus feeds, it does so by squatting down on its prey and infesting the corpse with thousands of feeding filaments that burrow through dead flesh to siphon away nutrients.