Blue Crab Biology and Conservation

Blue crabs are crustaceans found along the Atlantic coast, known for their blue claws and olive-green carapace. They inhabit underwater grasses and oyster reefs, feeding on a variety of marine life. Blue crabs play a crucial role in their ecosystem by managing prey populations. They reach maturity in 12-18 months, with females mating once in their lifetime. Blue crabs are economically significant, especially in the Chesapeake Bay, but face threats from overfishing and habitat loss. Efforts are underway to restore their populations. They have also become invasive in Northern Europe.

Where do blue crabs primarily live?

• In desert regions

• Along the Atlantic coast

• In mountain streams

• In freshwater lakes

What color are the claws of mature female blue crabs?

• Green

• Blue

• Yellow

• Red-tipped

What type of diet do blue crabs have?

• Omnivorous

• Carnivorous

• Herbivorous

• Detritivorous

How do blue crabs sometimes catch their food?

• By climbing trees

• By flying

• By burrowing and waiting

• By swimming rapidly

How long does it take for blue crabs to reach maturity?

• 3 to 5 years

• 6 to 9 months

• 12 to 18 months

• 24 to 36 months

When do female blue crabs mate?

• Before their first molt

• Only in winter

• During their final molt

• Every year

What is the term for female blue crabs carrying egg masses?

• Larvae crabs

• Juvenile crabs

• Mature crabs

• Sponge crabs

What is the lifespan of a blue crab?

• 1 year

• 2 years

• 3 years

• 5 years

What are blue crabs primarily prized for by humans?

• Their claws

• Their shells

• Their swimming legs

• Their sweet, tender meat

What efforts are being made to prevent a collapse in blue crab fisheries?

• Increasing fishing quotas

• Restoring sea grass beds and limiting harvesting

• Introducing more predators

• Building more fishing boats