Watch More River Monsters: http://go.discovery.com/?mkcpgn=ytapl2&url=http://animal.discovery.com/videos/river-monsters-most-dangerous/ Are sharks thriving in freshwater? Jeremy Wade discovers chilling evidence that they are: an 18-month-old bull shark, obviously born and bred in the river, not the ocean. Watch out for Season 2 of River Monsters in April of 2010
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