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The Lobster Life Cycle

The journey from a floating microscopic egg to a bottom-dwelling adult is perilous. Only a tiny fraction of lobster larvae survive to adulthood.

1. Mating & Egg Bearing

Mating typically occurs after a female molts. A large male will protect her while she is soft-shelled. After mating, she can store the sperm for over a year before fertilizing her eggs. When she lays them, she cements them to the underside of her tail (swimmerets). A female carrying eggs is known as a "berried" female and is strictly protected from harvest.

2. Planktonic Larval Stages

After 9-12 months, the eggs hatch into larvae. These tiny creatures float near the surface and undergo three distinct molts over several weeks.

  • Stage I: Resembles a mosquito larva; actively swimming but at the mercy of currents.
  • Stage II: Slightly larger, developing swimmerets.
  • Stage III: Claws begin to develop, but they are still swimming in the water column.

3. The Post-Larval Stage (Stage IV)

This is the transitional stage where the lobster resembles a miniature adult. It is a strong swimmer and begins looking for a suitable habitat on the ocean floor to settle. This "settlement" is a critical bottleneck in their survival.

4. Juvenile & Adult

Once settled, the lobster is a juvenile. It spends most of its time hiding from predators. It takes approximately 5-7 years for a lobster to reach the legal harvestable size (approx. 1 lb). Lobsters are long-lived species and can live to be over 50 years old, continuing to grow and molt throughout their lives.