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Wikipedia: The sperm whale, Physeter macrocephalus, is a marine mammal species, order Cetacea, a toothed whale (odontocete) having the largest brain of any animal. The name comes from the milky-white waxy substance, spermaceti, found in the animal's head, due to its resemblance to semen. The sperm whale is the only member of genus Physeter.
![[Sperm whaling]](http://images.ookaboo.com/photo/s/Whaling_of_sperm_whale_s.jpg "Sperm whaling")
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![[Sperm Whale]](http://images.ookaboo.com/photo/s/Sperm_whale_fluke_s.jpg "Sperm Whale")
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 from Pacman |
from Dilaudid |
![[Photo from above of barely-submerged whale with man in foreground]](http://images.ookaboo.com/photo/s/Sperm_Whale_s.jpg "Photo from above of barely-submerged whale with man in foreground")
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![[Photo of sperm whale with exposed back at the surface]](http://images.ookaboo.com/photo/s/Sperm_Whale_about_to_Dive_s.jpg "Photo of sperm whale with exposed back at the surface")
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 from Mousse |
 from Rlendog |
![[Photo of whale skin with many overlapping circular indentation]](http://images.ookaboo.com/photo/s/A_piece_of_sperm_whale_skin_with_Giant_Squid_sucker_scars_s.jpg "Photo of whale skin with many overlapping circular indentation")
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from Chris 73 |
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