The warning that you received from your dad and sisters reveal how much they truly cherish your well being and would always warn you of any dangers in every step that you make. To dream of a shark, represents a corrupt and ruthless person who is out to tear you down. The shark may also represent some characters and emotions in you like aggression and violence that may harm your mental stability and the peace of those around you. Your parents coming for you in the middle of the ocean signifies the parental love that never fades while the dolphin represents the undying love of God. One lesson that you need to learn from this dream is that despite all the undying love of parents and God, it’s always wise to listen to your parents’ advice and do away with any harmful emotions that might lead you and the people around you into trouble.