These are actually called mangrove crab or blue swimmer crab which are harvested in Indonesia, the image illustrated shows the live crab. After cooking you eat the whole thing and therein lies the taste, for the caterers choose the size that suits your menu and margin from the drop down menu below. Cooking instructions on the back of most of the branded packs we buy. If not it is just a case of lightly flouring and deep frying until crispy.