Dreams of a sea-serpent symbolize the fear that unlocking your sexual desire will be unsafe, dangerous, or painful. This dream is a message for you to irrigate the murky waters of your unexpressed desires so you can find a healthy expression for your deeper longings.... Strangest Dream Explanations
There may be an obvious lack of passion and life force in your life right now. In a desert, you have to look deeper for the signs of life that are actually there, so a dream that takes place in a desert may be calling you to do just that. Do not take the surface appearance of things at face value. Look below the surface and you will find that there is more going on than meets the eye.
A dream desert is also inviting you to irrigate and fill your life with more emotion and passion.... Complete Dictionary of Dreams