Oceans

What are the deepest canyons in the ocean called?

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What was normal cruising speed for the Titanic?
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Approximately how long can a sperm whale stay underwater on a single breath?
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What does a walrus eat?
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Which of these is a type of natural coral reef?
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As it pertains to oceans, what is bioremediation?
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Dissolved salt makes up what percentage of ocean water?
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Which is a long, skinny fish with a large snout and a head shaped like a triangle?
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The abyssal zone begins at what depth?
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