Oceans

In the 1970's, a large and failed expansion to Florida's Osborne Reef was comprised mostly of what?

More Questions from Oceans
Which ocean is among the traditional "Seven Seas"?
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What type of cnidarian makes up an underwater reef?
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What is the estimated top speed of a Sperm whale?
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What is the deepest ocean zone?
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The longest river in Europe flows into what sea?
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What covers the skin of a cuttlefish and allows it to change its color to blend in with its surroundings?
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A vessel with what name is credited with discovering the wreck of the Titanic?
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Hector's dolphin is the world's smallest dolphin and also the what?
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