The meaning of dreaming about a shell indicates a transition period in your life. The meaning of seeing or eating a clam in your dream represents your stubbornness and tenacity. If the shell is closed, the interpretation is that you're cold, withdrawn. You keep others away and don't let them interfere in your problems and feelings.
You may look in dreams interpretation for other symbols :
Classroom : The meaning of dreaming that you're in a classroom is that you get an important life lesson. Alternatively, it symbolizes personal growth. You learn something ... .html">
Clay,Argil : The meaning of dreaming about seeing or working with clay is creativity, flexibility and ability to shape your mind or integrate you well into a situation. ...