camilaorte
camilaorte
25-02-2014
Mathematics
contestada
why do sharks not have swim bladder
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tavarezgiselle
tavarezgiselle
26-02-2014
Unlike bony fish, sharks do not have gas-filled swim bladders for buoyancy. Instead, sharks rely on a large liver filled with oil that contains squalene, and their cartilage, which is about half the normal density of bone.
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