BBC - Science & Nature - Sea Life - Blue Planet Challenge

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8 December 2009
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To survive in the open oceans by adapting to life at sea.

You can complete this mission in either of the two ways below.
You can play the Flash game, Open Ocean, or you can play the All at Sea Quiz.

You are a fish. If you want to survive, you need to adapt. The most successful species have evolved over time to be perfectly suited to their watery environment. To take a step up the evolutionary ladder, you must understand your ocean world. Will you live long enough to be the very best?

There’s another way to experience life at sea (and it doesn't require a plug in).

Answer 20 questions about the global dynamics of the seas and extend your knowledge of the oceans as you go.

The open ocean is called the pelagic realm. It’s easy to imagine it as one big homogeneous mass of liquid, but there’s a great deal going on just below the surface...



	Normal open oceans usually contain about 3.5 per cent salt by mass. However, the northern part of the Red Sea in Israel is about 4 per cent salt. This apparently small difference in salinity makes the human body much more buoyant than usual, allowing one to easily lie back and read a newspaper without expending any energy.

For both of these, you'll only be able to see your scorecard and get feedback if you have registered and logged in.

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