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Sharks

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Uploaded by on Sep 11, 2009

Sharks have inhabited the oceans for more than 400 million years. Join shark expert Jeffrey Graham as he describes the adaptations that have allowed these magnificent creatures to thrive over the millennia. Learn how shark biologists study shark physiology, life history, and behavior for insight into what allows these animals to rank among the worlds most efficient predators. Series: Perspectives on Ocean Science [9/2009] [Science] [Show ID: 16782]

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LICENSE: Creative Commons (Attribution-Noncommercial-No Derivative Works).

For more information about this license, please read: http://creativecommons.org/licenses/by-nc-nd/3.0/.

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  • yes, in fact a "swim bladder" (being gas-filled) would be disadvantegous to efficient swimming...as it only increases the cross-sectional area presented to the (normal direction) flow.. (see Morison Drag Equation).

  • Some things never change

    That is a very good thing.

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