In his quest to save the world's big fish, aquatic ecologist Zeb Hogan has wrangled what's currently the world's biggest known freshwater species, the Mekong Giant Catfish. But is it really the biggest? We'll join Zeb as he travels the globe, seeking out the leading contenders in a quest to better understand them as he fights to protect them.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | August 2017 | August 2020 | 5 |
| Season 1 | April 2008 | December 2010 | 7 |
| Season 2 | July 2010 | August 2010 | 6 |
| Season 3 | July 2011 | August 2011 | 7 |
| Season 4 | May 2013 | August 2013 | 6 |
| Season 5 | July 2014 | August 2014 | 8 |
| Season 6 | January 2016 | January 2019 | 10 |
| Season 7 | June 2018 | October 2018 | 3 |
| Unassigned Episodes | 10 |
| Season | From | To | Episodes |
|---|---|---|---|
| Specials | 0 | ||
| Unassigned Episodes | 62 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 62 |
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