In many U.S. states, it's the law that you have to throw back female crabs. This is so that the species can reproduce sustainably. However, blue crab populations continue to be decimated by human activities.
The meat of the blue crab is considered by many to be the sweetest and best tasting of all crabs. You won’t get the large sections of meat that you get from the king crab or the snow crab, but the flesh from the blue will be tastier.