Silverfish tend to disappear just as you get a good look at them. If you can take a photo, save it. Where you found the insect matters too: beside the tub, inside the vanity, or in the linen closet.
They have a tapered body, long antennae, and three tail-like appendages. Damp, sheltered places can suit them, which is why a bathroom or basement deserves a closer look when sightings repeat.
Don’t assume they came from the drain
Finding one in a tub tells you where it ended up. It doesn’t prove the drain is the source. Don’t pour pesticide into the drain to chase a problem that hasn’t been identified.
Instead, look around the surrounding room. Is there moisture under the sink? A damp cabinet floor? Activity along the same baseboard? Tell your technician what you find.
Clear enough space to see what’s happening
Move loose items out from under the sink so you can check the cabinet and plumbing connections. Arrange repairs for leaks, and have ventilation problems addressed if the bathroom stays damp.
Check nearby stored belongings too. Silverfish can damage some papers and fabrics. Dry storage and a less cluttered cabinet make it easier to spot continued activity.
You don’t have to empty the whole house over one insect. Start with the affected area and keep track of whether the problem returns.
When to ask for treatment
If sightings keep happening, spread into other rooms, or accompany damage, ask for help. A simple description is useful: “I’ve seen three by the vanity this week, and we recently fixed a leak.” That’s a report to share, not a treatment threshold.
Silverfish control is included in Envexa365. The plan provides four scheduled pest visits a year and callbacks included for covered pests between visits. Initial service is priced separately from monthly billing.
Pest service and moisture repairs do different jobs. We can discuss the pest activity, but plumbing, ventilation repairs, and separately quoted sealing work aren’t included in a general pest plan.
Further reading: University of Maryland Extension on silverfish.