Blue crab is the most "traditional" crab to use in this recipe but dungeness, king, or snow crab will work equally well. Use what you have available.
You need the equivalent of 4 large eggs for this dish, but can easily replace any number of them with the appropriate amount of egg whites.
You need ½ cup of dairy for this dish, but can adjust the fat content and richness of the dish by adjusting the proportions of milk and heavy cream. It can even be made with solely a ½ cup of skim milk.
For an interesting variation replace the normal corn kernels with roasted whole kernel corn. It will lend a pleasant smokiness to the dish. For this I use Trader Joe's Roasted Corn rather than roasting my own.