To see a shark is to get a warning to which you should pay attention. It can indicate that you are depending too much on somebody. Try to behave more confidently and maturely, and you will become more independent. You will definitely get more respect from people that surround you.
For those who are ill, seeing a shark is a positive signal which promises quick recovery.
If you manage to avoid a shark’s attack in your dream, you will probably dodge problems in your real life too.