Dreaming of sharks is common.  Sharks represent haunting fears that are unconscious.  A belief or underlying fear may be swimming around in the recesses of your mind, and you are afraid to see what it is.  Since water often symbolizes your unconscious, the thoughts are buried deep within your mind.  You may feel that if you let these thoughts see the light of day that they will chew you up or destroy your life.  You need to face your fear.  It is only in facing the fear that the shark will go away in your dreams.  Then you will be able to swim through the waters of your unconscious uninhibited!  See Water.