Education of the Mind: TIL the Arapaima (a freshwater fish in South America) only get 20-30% of their oxygen from their gills so they pop their mouths out of the water every 15 minutes to breathe

Friday, July 14, 2017

TIL the Arapaima (a freshwater fish in South America) only get 20-30% of their oxygen from their gills so they pop their mouths out of the water every 15 minutes to breathe

http://ift.tt/2ggBWFY via /r/todayilearned http://ift.tt/2sZI9fZ

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