Mix together all ingredients except crabs in a shallow baking dish. Add crabs and cover. Marinate for 1/2 hour.
Place crabs on a hot grill. Cook for 15 minutes on each side, basting and turning often. To decrease cooking time, cover grill with a large lid to help circulate the heat evenly.
Crabs are cooked when red, firm and slightly crisp, but still moist. Serves 4.
» The softshell crab industry began during the 1870's in Crisfield, Maryland. The average annual production of soft crabs in the United States exceeds 2.6 million pounds, with the majority coming from the Chesapeake Bay.