Lovecraft saw amazing things, and I'm thinking they were real. Except---maybe they were also very, very small. Small as in 1/2 milimeter in size. This picture is of something called a hydrothermal worm. It's something to think about when the bedbugs stop being creepy enough for you.
This is from the folks at Red Orbit, who published this picture taken with a FEI Quanta SEM electron microscope and the photo is credited FEI/Philippe Crassous