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Baby Silverfish (6 Things To Know)

baby silverfish

If you discover baby silverfish in your home, you likely have an infestation. Baby silverfish are the nymph form of adult silverfish. To better understand what baby silverfish are, you need to know their characteristics such as life cycle, hiding spots, and preferences that affect their behavior and feeding activity.

Despite their small size, baby silverfish can be quite resilient and adaptable, able to survive in a wide range of environments and even go without food for several weeks. Therefore, it is important to get rid of an infestation as soon as it is discovered.

Read on below to learn more about baby silverfish.

6 Things To Know About Baby Silverfish

1. Life Cycle

Female silverfish can lay their eggs anywhere in a home, often choosing hidden, humid places to store them. These eggs typically hatch within 20 to 40 days, giving rise to baby silverfish, also known as nymphs. These nymphs will eventually molt, grow, and develop into full-sized adult silverfish, a process that can take up to a year depending on factors such as temperature, humidity, and availability of food sources.

They typically molt between four and eight times before reaching adulthood. Each molt allows the silverfish to shed its exoskeleton and develop a new one, allowing for the growth and development of more distinct features.

Under optimal conditions, such as a warm and humid environment with plenty of food, silverfish can reach maturity within just a few months. In cooler climates, where temperatures may be lower and food sources may be less abundant, it can take silverfish up to two years to develop into adults.

Once they become adults, they can continue to live for up to three years, during which time they may continue to reproduce and lay eggs, leading to the growth of a larger population within a home.

2. Reproduction

Silverfish engage in a mating ritual that involves a dance where the male and female touch each other with their antennae and then chase each other around. This dance can last several minutes and is essential for successful mating.

After mating, the female silverfish will lay her eggs in cracks and crevices in the surrounding environment. These eggs are very small and can be difficult to see with the naked eye, often requiring a microscope to detect them.

It’s worth noting that while silverfish typically only mate once in their lifetime, they can continue to reproduce throughout their adult lifespan. Females lay multiple batches of eggs and contribute to the growth of the silverfish population.

3. Appearance

Baby silverfish, or nymphs, look very similar to adult silverfish with the same long antennae and tapered bodies ending in three appendages that fan out like a fishtail. However, when they first hatch, they are usually white and somewhat translucent. Their bodies may appear softer and more delicate than those of adult silverfish.

During each molt, the silverfish may appear white or translucent as their new exoskeleton is soft and not yet fully developed. As the new exoskeleton hardens, the silverfish’s distinctive gray-silver coloration and other features such as their antennae and three-pronged tail become more pronounced. They take on the characteristic silver coloration that gives them their name. Adult silverfish typically reach a length of around half an inch, although this can vary depending on the species and other factors.

4. Diet

Nymph silverfish have a similar diet to adult silverfish, which consists of starchy and high-protein items such as grains, paper, glue, and fabrics. They are often found in areas where these types of materials are abundant, such as basements, attics, and bathrooms. Nymph silverfish can survive for long periods without food and water, but they will actively seek out sources of nutrition when they are available.

5. Behavior

Silverfish are typically active at night. During the day, they hide in tight cracks and crevices such as in baseboards, behind wallpaper, under carpets, and in other areas where they can remain hidden from view. They are also known for their preference for moist areas with room temperatures ranging from 70°F to 90°F.

This makes them well-adapted to living in human homes, where they can be found in a variety of locations such as living rooms, bedrooms, bathrooms, attics, basements, garages, and even shake roofs. Silverfish can also be found in commercial settings such as laundromats, restaurants, and factories that have machines generating steam and condensation. These environments provide the high humidity levels that silverfish prefer.

In addition to entering homes and buildings through pipes and drains, silverfish can also be brought in on infested items such as cardboard boxes, books, and clothing. Once inside, they can quickly establish themselves and begin to reproduce, leading to a growing population of these pests.

6. Silverfish Lifespan

The environment can have a significant impact on the development and lifespan of baby silverfish. In general, silverfish tend to mature more quickly and live longer in warmer temperatures. In an ideal environment, silverfish live about three years.

Getting Rid Of Baby Silverfish

It’s important to note that while silverfish can cause damage to household items and food, they are not considered a major threat to human health or safety, mainly because they cannot bite. However, some people may experience respiratory irritation or allergies due to the presence of silverfish feces or shed skin. Additionally, their presence can be unsightly and their damage can be costly to repair. If you suspect a silverfish infestation in your home, it’s best to take action to address it promptly to prevent further damage.

Traps & Insecticides

There are commercially available traps and insecticides that can be effective in controlling silverfish infestations. These products may contain chemicals such as boric acid, diatomaceous earth, or pyrethroids. It is important to carefully follow the instructions on these products and use them safely and responsibly.

Bestseller No. 1
Dekko Silverfish Paks (Pack of 2)
  • Listing is for 2 boxes of Dekko paks 24 paks per box 48 total paks
  • Place 2 to 3 packs in each infested area. Place in closets, drawers, bookcases, in basement and dark hidden areas.
  • When Dekko Silverfish packs are used as the only treatment, control may not be obtained from 3 days to 4 weeks depending on conditions. Replace Packs as necessary to affect and maintain control
  • Made in the USA

Here’s a simple DIY trap for silverfish:

  • Need: Glass jar (no lid), masking tape, bait (such as bread or cereal)
  • What To Do: Take a glass jar and wrap the outside with tape, creating a textured surface for the silverfish to crawl up. Put some bait at the bottom of the jar. Place the jar in an area where you have noticed silverfish activity. Wait for the silverfish to crawl into the jar and become trapped. Check the trap regularly and dispose of any trapped silverfish.


By implementing prevention and control measures, you can help keep silverfish at bay and protect your home from their damage.

  • Store food items in airtight containers to eliminate potential food sources for silverfish.
  • Remove any cardboard boxes or paper bags, as silverfish love to feed on paper products.
  • Keep your home clean and clutter-free, as silverfish love to hide in cluttered areas.
  • If you spot silverfish in your home, vacuum them up and dispose of the vacuum bag promptly to prevent any eggs or young from hatching and spreading.
  • Seal up any cracks or crevices around your home and install weather stripping on doors and windows to help prevent them from entering.
  • Regularly inspect areas where moisture can build up, such as under sinks, around pipes, and in the basement, and address any leaks or excess moisture.
  • Consult with a pest control professional to identify and address any underlying conditions that may be contributing to the infestation, such as mold or moisture issues.


Baby silverfish have a similar diet and preference for humid environments as adult silverfish. To prevent a baby silverfish infestation, reduce moisture levels in your home and keep it clean and well-ventilated. If you find them in your home, use sticky traps or insecticides specifically designed for silverfish. Regular maintenance and monitoring can help prevent future infestations.