“From what I have read I think I may have drain fly larvae in my jacuzzi jets”, writes this reader in her submission regarding the organism pictured below. “They are dark brown and when looked at through a magnifying glass, they look like tiny millipedes. Can you please confirm? Thank you!” Immediately off the bat, can we say that these are indeed drain fly larvae: their long, thin dark bodies and tapered ends point to this conclusion. Likewise, the location they were found in matches up with the behavior of drain fly larvae.