The beach - the meeting place of two worlds, land and sea, which may symbolize the conscious and subconscious, as well as the logical and emotional, realms of the human psyche. Perhaps there is something within your subconscious that the conscious mind needs to acknowledge. This dream may hint that you are not getting as much pleasure out of life as you could. It may show that you need a period of relaxation and rest. On the other hand, this dream may suggest that you take more interest in your work so that the daily grind becomes less of a trudge and more of an adventure.

Water is emotion, and because the tide and waves come up on you so suddenly suggest that something has happened suddenly in your waking life, and you feel that your emotions are threatening to 'get away' from you. Dodging these waves suggests you may be dodging your emotions as well.

Shark(s) - remember that the water in your dream is a symbol of your emotions and the subconscious.
Sharks are water-dwelling animals, and could represent unpleasant emotions or difficult and painful materials coming up from the subconscious, as well as your fears and problems in waking life. The shark also symbolizes feelings of anger, hostility, and fierceness.
If you are feeling some emotional upset, or are going through a difficult, painful, or unpleasant emotional period, then the sharks could be a symbol of what, or who, is causing the emotional danger, or upset.

Alternately, the shark may represent someone you see as greedy and unscrupulous. This person goes after what he or she wants with no regards to the well-being and sensitivity of others. The shark may also be an aspect of your own personality which exhibits these qualities.
Old dream interpretation books say that sharks may represent dishonest 'friends', or reflect financial troubles.

Crevasse/Trench - signifies that you feel suspicious of someone in your waking life. It could be your subconscious telling you that you need to be cautious with strangers, and others, who would have you believe they are your friend.
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Have you been betrayed by someone you thought was a friend?
Have you recently come into some money, or other good fortune, and everyone seems to have their hand out?
Is there a situation that is causing your emotions to feel out of control, or as though they might consume you?
Have you been offered an opportunity of some sort, but you're wary of it...or don't think it's on the 'up & up'?

Hope I could give you something to go on... Best of luck!

You are quite welcome SD, I'm glad I could help.
Hugs & Hope,
J