Why are mitten crabs illegal?

Online Answer
On June 22, 1989, mitten crabs were listed as injurious wildlife under the Lacey Act. These crabs are a hazard to human health, the economy and natural resources. Mitten crabs can outcompete native species for food and space. Their burrowing activity can cause damage to levees resulting in significant erosion.
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First of all, the vinegar will reduce the boiling point of the water present in your steaming pot, thus helping you to steam your crabs quickly. It will allow you to serve the crabs in a better way whenever you are in a hurry.
5.) Once the water has started to boil again, reduce the heat and simmer for the required time. The cras shell should turn a bright orange when done..