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View Diary: Marine Life Series: The Coolest Fish on Earth (167 comments)

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  •  Not one answer. (1+ / 0-)
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    lineatus

    Some have gas bladders for buoyancy control.  Others don't.  So that would be an important difference.  Open water fish more tend to have the bladders; bottom dwellers more often do not.  Some pretty snazzy physiology to those gas bladders - part of why fishes go belly up when they die, for one thing.

    "The river always wins" - Mark Twain

    by Land of Enchantment on Thu Feb 26, 2009 at 07:18:58 PM PST

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