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coral reefs are formed by

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divers can help protect the marine environment by

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The ocean is an important source of life because

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divers should avoid contact with all corals because

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water comprises about xxx of the earths surface

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when diving in marine protected areas like marine parks, divers should

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examples of freshwater marine life include

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two examples of soft corals are

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more than xxx of earths oxygen is produced by marine plants

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if a diver is injured by harmful sea life, it is usually because of

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The most common injuries occur when

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two examples of hard corals are

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The term repetitive dive is defined as

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The most important reason for planning your dives and executing the dive per your plan is to

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A dive computer keeps track of a divers nitrogen absorption levels so that the Diver can

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