Have three tails, indicators of clean water.
San Diego County, California, US
衣魚 (Lepisma saccharina)
this little creature was well east of the nearest vegetation about the high water mark
When my insect cabinets arrived in June, this silverfish was also in one of the boxes. I think it hitched a ride from the receiving warehouse on campus (not from the the vendor), or it might have already been living in my lab.