This video is about Spinosauridae dinosaur species size comparison. FEATURED TAXA: Irritator, Valibonavenatrix, Icthyovenator, Baryonyx, Suchomimus, Oxalaia, Spinosaurus/
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Dear Kitty. Some blog 
doesn’t that large ‘fin’ on his back help him propel himself in water?
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We don’t know.
There are other theories.
‘Multiple functions have been put forward for this structure, including thermoregulation and display.’
https://en.wikipedia.org/wiki/Spinosaurus
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