They have claws for hunting and defensive purposes, as well as walking and swimming legs for escaping from predators. Related: 10 Best Crab Shacks on the Chesapeake Bay Stowaway blue crabs on ship ballasts have even showed up in the Mediterranean. An adult louse can lay up to six eggs per day … It was first seen off Egyptian waters in the 1940s, but reports of blue crab sightings in … Depending on the type of crab, it can lay from a few hundred eggs to a few million. For example, hermit crabs may lay up to 600 eggs, while blue crabs can lay up to 8 million eggs. To begin, female blue crabs can only mate once in their lives. Female blue crabs mate only once in their lives, when they become sexually mature immediately following their pubertal molt (immediately following this molt, the female is known as a "sook.") The Blue Crab is a species of crab located in the Atlantic Ocean from Argentina to Nova Scotia. Blue Crab Mating Mating. Blue Crab Life Cycle. For example, hermit crabs may lay up to 600 eggs, while blue crabs can lay up to 8 million eggs. Mating Mating. All winter, the females have remained on the bottom of the Bay, most of them in the deepest water. Thanks for the A2A! There, however, the crab is invasive. The exoskeleton of the Blue Crab is very hard like most crustaceans. The blue crab's activity begins in early spring, when the waters of the Chesapeake Bay warm and the crabs stir from their dormant state. Depending on the type of crab, it can lay from a few hundred eggs to a few million. It depends on the size of the individual crab but a large female Dungeness can extrude as many as 2.5 million eggs. Only one live bug can be produced per nit or egg. However they can release eggs up to 2 times because of the sperm stored from the females only mate. After the egg is laid, it takes roughly seven to 10 days for it to hatch.Once the egg hatches, it takes another seven to 10 days to reach maturity and begin laying eggs of its own. There might be some semantic issues with the term “lay” though.