Mathieu Goedefroy, zoo spokesman told CNN that the primates, "must be entertained, occupied, challenged and kept busy mentally, emotionally and physically at all times."
The Asian small-clawed otters were allowed to live in the river that runs through the orangutan enclosure, as part of the program. And the otters really love hopping out of the water and playing with their furry friends!
The orangutan family includes Ujian, Gempa, another male, and Sinta, a female. "Our keepers entertain them all day long with mind games, riddles, puzzles, and other stuff to train their intelligence," Goedefro added.
And who would've guessed it, seems like life is simply more fun and interesting for both animal species. And as Goedefro puts it, "a very successful experiment."