“Can you help me identify what is growing underneath my bathroom cabinet?” is all Jennifer writes in her submission regarding the strange, hair-like growth pictured below. As much as hair is worm-like in shape, this growth is too, but we highly doubt that these are worms. We would be more inclined to suggest that this is some type of fungus (mold) or alga. Now, we are no experts on either of these organisms, as our thing is worms and worm-like critters, but we will do our best to provide any and all information that might be relevant to Jennifer’s situation.