McDonald's Happy Meal web site confirms that the October 2015 kids' meal theme will be based on the current film Hotel Transylvania 2 (not The Nightmare Before Christmas, which was released back in in 1993).
There are differences in the shell textures of oysters and clams. The shell of a clam is smooth and shiny while an oyster has a rough outer shell. Both the organisms take in water through the shells but the filtering procedure is different. Oysters produce pearls which are in much demand but clams do not.
How to store, open, prepare, cook and serve oysters. Introduction to the oyster. Although oysters generally fall under the category of seafood and shellfish, they are actually classed as molluscs and belong to the same family as mussels, scallops and clams. Oysters are the most expensive shellfish available and are now considered a luxury, although this was not always the case.