A few semiterrestrial crabs are known to produce urine more History at your fingertips Sign up here to see what happened On This Day, every day in your inbox!Pseudocarcinus gigas ) are two of the largest known crustaceans.Standards of Good Practice.

The Washington State County Road Administration Board (crab) provides accountability through standards of good practice, fair administration of funding programs, and engineering and technology assistance to the 39 Washington State County Road Departments in accordance with (.Unlike those of other decapods (e.g., shrimp, lobster, crayfish crabs tails are curled under the thorax, or midsection.

As in most crustaceans, the young of nearly all crabs, when newly hatched from eggs, are very different from the parents.The crabs of the family.Economic importance, many crabs are eaten by humans.