The life cycle of a silverfish (a small, wingless insect from the order Zygentoma) is characterized by incomplete metamorphosis, consisting of three stages: egg, nymph, and adult. Silverfish are known for their long lifespan compared to other insects and their gradual development. Here’s a detailed look:

1. Egg Stage

• Duration: 2–8 weeks, depending on environmental conditions (temperature and humidity).
• Female silverfish lay eggs in hidden, protected places like cracks, crevices, or damp areas.
• Eggs are tiny, white, oval-shaped, and difficult to see without magnification.
• Favorable conditions for egg development are warm (21–32°C or 70–90°F) and humid (above 75% relative humidity).

2. Nymph Stage

• Duration: Several weeks to months, depending on conditions.
• Nymphs are miniature versions of adult silverfish but lack reproductive organs and scales.
• They go through multiple molts, gradually growing in size and developing scales that give them their characteristic silvery appearance.
• The number of molts can range from 8 to more than 60, depending on species and environmental factors.

3. Adult Stage

• Duration: Up to 2–8 years, depending on species and environment.
• Adult silverfish are typically 12–19 mm long, with a silvery, metallic sheen and a tapered, elongated body.