Silverfish Lifecycle: How Long They Live and How They Breed

Silverfish are among the oldest insects and can live a long time compared with many household pests.

The short answer

Silverfish lay small clusters of eggs in cracks. Nymphs hatch looking like tiny adults and moult many times over months, and adults can live for several years. They do not have a pupal stage. Because they hide and breed slowly but steadily, an infestation may go unnoticed. Reduce humidity and hiding places to break the cycle.

Stages

1. Eggs laid in cracks and crevices.
2. Nymphs hatch, resembling small adults.
3. Repeated moults over months.
4. Adults live for years and keep laying eggs.

Why they persist

• Long lifespan.
• Hidden harbourage.
• Can survive long without food.

Breaking the cycle

• Lower humidity.
• Seal cracks.
• Reduce paper and cardboard clutter.
• Professional treatment if needed.

When to call a professional

If the problem is widespread, keeps returning or you are unsure what you are dealing with, a professional inspection will save time and avoid wasted effort.

Frequently asked questions

How long do they live?

Often a few years.

How many eggs?

Small batches over time.

Do they moult as adults?

Yes, repeatedly.

Do they die in dry homes?

They struggle but may persist near moisture.

This guide is part of IPest's complete resource on silverfish control. For identification help, prevention and treatment options, see our full silverfish control guide for Bangalore.