Do dolphins ever kill sharks

YOU SAID: A dolphin can not kill a shark. This is too general a statement. A dolphin can poke at a hammerhead shark so that the shark flips into the air. Then the dolphin calls his friends, and they poke the hammerhead to death. It's a fact. DUHH

I SAY: Not only were you rude, worse... you were wrong. Bottleneck dolphins can and do kill sharks. When one feels threatened, it calls to others, and together they ram the belly of the shark to death. And that is a fact, and I won't return the insult by saying DUHH b/c that is not only juvenile, it is just plain not nice.