“I have found several of these worms in the last few days”, writes this reader in her submission regarding the segmented, black, worm-like creature pictured below. “Usually in my bathroom sink. I am in Angleton, Tx. What are they?” Based on the photo alone, we have concluded that this is a black soldier fly larva (BSFL): the shape and clear-cut segmentation of this creature’s body is characteristic of a black soldier fly larva. Not to worry, black soldier fly larvae are not harmful to humans at all. In fact, it is quite the opposite. Black soldier fly larvae are somewhat of a phenomenon.