Silverfish

5612  I find at least 3-4 of these slithery bugs in my basement bathroom every wk, depending on weather. I am located in the GTA (Toronto, On) they look black and alien like in person, but as I took a picture they don’t look as scary. They still move very fast. Ty
This either is a silverfish (Lepisma saccharina; Zygentoma: Lepismatidae) or a very close relative, basically nuisance pests that do little real harm. See http://tinyurl.com/mc5vk7j for images and more detailed information.  Ed Saugstad, retired entomologist; Sinks Grove,