“As my husband has been losing a bit of weight, he was wondering if [this worm] was something other than an earthworm!” writes this reader to us about the creature photographed below. In the photo, we see a long, thin, pinkish-brown worm lying on what looks to be a piece of toilet paper.

A reader recently sent in this image of a long, brown worm she found in her toilet. She is trying to determine if the worm is an earthworm or an intestinal parasite.