Only four species of shark will actually attack humans: * Great
white shark, * Tiger shark, * Oceanic whitetip shark, * Bull
shark.
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Upto 4metres but they don't ussually exeed 3metres.
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Indeed, bull sharks (Carcharhinus leucas) are considered the most dangerous shark species for divers and swimmers, along with the tiger shark (Galeocerdo cuvier) and the great white (Carcharodon carcharias).
The late Commander Jacques-Yves Cousteau considered the oceanic whitetip shark (Carcharhinus longimanus) the most dangerous shark in the ocean.
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The tiger shark and easily too. They are much larger, heavier,
and have more effective teeth