I can't believe I missed this thread for so long! Noonie: The crab and lobster 'brains' you refered to I believe (at least in Chesapeake Bay crabs) is called the 'mustard' and can be yellow or green, and is the fat.
I used to eat raw oysters, until a parasite became popular in them. Fried oysters are good too. Soft crab sandwiches, Crab Fluff, Fried Hard Crab, Crab Imperial, Crab Dip. Orange Roughy, Crab-stuffed mushrooms, Fried Mushrooms. Catfish, Blackened Catfish, Japanese Octopus. Roe or caviar. Yum!