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.
1 Clams can control their outer shells and shut them in response to stimuli, via a elastic ligament and two large muscles. 2  In side their usually grey, black shells you can see a white, tan center. 3  Clams have siphons that forces water out and allows them to take in micro organisms. Clams have two shells(Bivalve) that filters their food. 2  Clams can control their outer shells and shut them in response to stimuli, via a elastic ligament and two large muscles. 3  In side their usually grey, black shells you can see a white, tan center.