Oceans

The only enemy to the orca or killer whale is which of the following predators?

More Questions from Oceans
What was the largest oil spill in terms of volume in the 20th century?
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The St. Lawrence Seaway opened in 1959 allowing oceangoing ships to reach which Minnesota city?
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The average life expectancy of beluga whales is approximately how many years?
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Who became the first European to see the Pacific Ocean in 1513 by crossing the Isthmus of Panama?
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A manatee is also known to be called what?
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In what year did Alfred Wegner publish "The Origin of Continents and Oceans"?
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A wave form that moves forward with a steady velocity is called what?
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The 'Bering Strait' is a piece of the Pacific ocean that divides which of these two countries?
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