The movie Jaws was extremely culturally influential and created an entire generation of people afraid of sharks. Though it cannot be singlehandedly blamed for our negative perception of sharks, it was a big cause of panic at beaches and has resulted in this creature being culturally misunderstood. Unfortunately dream meanings usually don't have anything to do with scientific understanding, but a more personal one, so unless you are a shark sympathizer, the meaning of dream regarding sharks is probably going to be a negative one. Certainly, a normal dream dictionary will usually site sharks as the bringers of bad news, but you are probably wondering what the shark that you saw in your dreams meant, so it is time to get a bit more specific.
If you have seen the dream symbol of a shark recently, then it is probably because you are angry, or feel hostile. This is one dream meaning that is very straight forward, but for an example, it could be that you have had an argument recently. Perhaps you feel intensely right about your position in an argument and are angry with the person that you are arguing with for not accepting your decision. Whatever emotion you are feeling, it is probably a strong one. Dream interpretations suggest that you could be a danger to yourself or others in an emotional sense, or that if you do not gain control of your temper, you could be dangerous to others.
One more dream interpretation of a shark is that of a greedy or bad person. Perhaps you are not the shark in this situation, but fear the sharks in the dream. Do you know anyone that is an angry or unscrupulous person, or someone that might hurt you, or someone you love? Perhaps it is a financial grievance that you have with a person and you expect them to try to cheat you in some way, or take your money. Either way, if you know someone like this in life, then the shark might just symbolize that person's presence and your fear and apprehension against them.
One final alternate interpretation of the shark in your dreams could be that you are feeling angry or independent in regards to a romantic relationship. Perhaps you feel that you are not your own person within the relationship or that your partner is in some way inhibiting you. This can be a common feeling after the first few months of a relationship when you begin to get settled into a routine and start to feel that your partner is hindering you or keeping you down. These feelings are what make or break a relationship, and are usually over after a few months, or result in your breakup depending on how you handle this period, so if you are having dreams about sharks, this could be an extremely important period for you.