A reader contacted us via Facebook to ask about a “worm” he found in the toilet. The picture he sent us shows a small, segmented creature that has a beige body with light brown stripes and a dark brown head and tail.
After examining the photo, we are confident that he has discovered moth fly larvae. These larvae are quite common, and often identified by their dark heads and tiny size. Moth fly larvae are also known as “drain fly larvae” because they are usually found in or near water, like in a shower or sink drain. Since our reader found these in the toilet, the larvae are probably feeding off some decaying organic matter in the toilet bowl or the pipes. To get rid of them, he should start by purchasing toilet bowl cleaner that is designed to remove organic matter. Using a toilet brush and/or pipe brush, he should thoroughly clean his toilet. If he can remove the organic matter that is serving as a food source for these larvae, they will no longer reside his toilet bowl!
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In summary, our reader found a “worm” in his toilet bowl that we have determined to be moth fly larvae, also known as drain fly larvae.
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