2009 | 24 Episodes

Season 0 of River Monsters premiered on May 31, 2009.

2009 | 7 Episodes

Season 1 of River Monsters premiered on April 5, 2009.

2010 | 7 Episodes

Season 2 of River Monsters premiered on April 25, 2010.

2011 | 7 Episodes

Season 3 of River Monsters premiered on April 10, 2011.

2012 | 8 Episodes

Season 4 of River Monsters premiered on April 1, 2012.

2013 | 6 Episodes

Season 5 of River Monsters premiered on April 14, 2013.

2014 | 6 Episodes

Season 6 of River Monsters premiered on April 6, 2014.

2015 | 6 Episodes

Season 7 of River Monsters premiered on April 5, 2015.

2016 | 6 Episodes

Season 8 of River Monsters premiered on April 7, 2016.

2017 | 6 Episodes

Season 9 of River Monsters premiered on April 23, 2017.