Extension > Garden > Diagnose a problem > What insect is this? > Insects found indoors > Beetles, bugs, ants, and other insects without obvious wings - Larger than 1/4 up to 1/2 inch long > Silverfish
Jeff Hahn, University of Minnesota Extension
Ken Gray Collection, Oregon State University
Description: 1/4 - 1/2 inch long.
Where/When: Found indoors in cool, damp, dark places throughout the year. Often associated with basements, but can be found in many rooms in homes.
Significance: Mostly a nuisance. They may damage paper.