In a very large pot, bring a generous amount of salted water to a boil. souse crab legs & corn on cob and cooking until ears are tend and crab meat is obscure, about 22 min . Tap very well.
Dissolve butter in a great pot ; add garlic, mashed red pepper & sea food spices. Join crab cobs and legs and put to coat well with garlic butter. You can also jump this step and serving garlic butter for a dip.