If you ever find a pseudoscorpion in your bathtub, don't worry! These tiny arachnids are harmless to humans. Although the pseudoscorpion has pincer-like claws that look like a scorpion's, the pseudoscorpion lacks a stinger. When they are in search of moisture, pseudoscorpions often become stranded in sinks or bathtubs, unable to climb out over the smooth surface.

Image credits: main image, © Donald Hobern/CC BY 2.0.