Dolphins are in actual fact more dangerous than sharks. They have DNA that enables them to defend themselves in the wild, also if a shark comes at them, and all else fails, they can just whip out their air rifles, and shoot the buggers.
dolphins defend themselve by using their mouths againts predators like sharks and orcas
Dolphins are known to defend themselves against sharks and have been observed to chase them away in the wild. In some cases, dolphins have been known to injure or even kill sharks in self-defense or during competition for food. It is not common for dolphins to actively seek out and kill sharks as their primary source of food.
because sharks can protect themselves
Dolphins beat up sharks because they are trying to defend their young ones and to drive the sharks away so that they the sharks don't bother the dolphins anymore.
sharks defend themselves because they are afraid of being eaten and attacked by the other fish or animals
Dolphins are actually predators themselves, but are hunted by two species: orcas and sharks.
They ram their noses into their prey at high speeds. They have enough power to kill sharks
The best answer would be in no way do they harm humans. There have been many stories of dolphins saving humans than there have been stories of dolphins hurting humans. If you would like a better answer I suggest you look in a book about dolphins and how they defend themselves.
Any body who's ever watched Flipper knows that most sharks are leary of dolphins and porpoises. They can out swim sharks and ram them with their 'beaks'. This may not apply to the Great White Shark who is pretty impressive swimmer in its own right.
shark are scared of dolphin.
sharks defend themselves wuth their fins and their teeth!
They aren't any relationship between them as sharks eat dolphins.