by Stephanie Smith
June 17, 2016
Tuana Phillips, a staffer with the Chesapeake Research Consortium, holds an adult blue crab during a trip to Smith Island, Maryland. With its bright blue claws, the colorful crustacean is one of the most recognizable species in the Chesapeake Bay. A blue crab’s strong claws allow it to crack open or pry apart the shells of clams, snails, mussels and more in its search for a meal.
But blue crabs don’t just use their claws to find food: they can also use the powerful pincers to defend themselves. Their sharp and strong grip can be quite painful, as anyone who has ever been pinched by one can confirm. And if threatened, a crab may break off claw or leg to try to escape predators; the limb will later regrow through a process called regeneration.
Crab claws have made headlines in recent months with viral images and videos showing the crustaceans wielding everything from cigarettes to knives. And though these posts may seem silly, as Jack Cover of Baltimore’s National Aquarium told The Washington Post, the crabs in these images are “absolutely distressed”: either unable to let go of what they’re holding or instinctively clamping their claws in self-defense. If you see a blue crab, it’s best to avoid putting anything—especially your fingers—between its claws.
Learn more about Callinectes sapidus, the blue crab.