100 were killed by humans
There were 71 reported cases of fatal shark attacks on humans worldwide in 2007.
about 25 dolphins are killed in one day!!
About 12,000 dolphins are killed each year
worldwide approximately 57633
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No, dolphins do not view humans as food, and have, in many cases, fought to protect humans. This is not to say that a dolphin can't attack a human, but humans aren't their prey.
I am not to sure I don't think anyone would be because more people are killed everyday by humans in every different way! But this is how many people died this year and today:
Loads
yes dolphins are protective over humans they also protect us from drowning and shark attacks. they are also very protective over their calve, baby dolphin.
The number of total dolphin deaths is unknown, but approximately about 20,000 are hunted and killed in Taiji, Japan by dolphin poachers. A dolphin has a life span of about 25 years, but can reach a maximum life span of 40.
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.