On the September 23 airing of SBS's 'Laws of the Jungle in Mongolia', Seo In Guk and M.I.B's Kangnam had a heated fishing battle by the river where the group decided to camp for the night!

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Before heading off, Seo In Guk impressed everyone with his extensive knowledge of fishing, having had experience during his previous appearance on the Indochina season. However, despite his self-proclaimed title of 'Fishing King', Seo In Guk failed to catch anything substantial, while Kangnam reeled up 3 fish! Undoubtedly, being same-age-friends stirred up their rivalry even more!

In the end, Seo In Guk and Kangnam managed to work together to catch enough fish to feed the rest of the cast for the night. 

Way to go, you two!