Osaka's Tennoji Zoo was left shocked after a DNA test revealed that its male resident hippo is in fact a female! 12-year-old Gen-chan had come to Japan from Mexico 7 years ago. The Zoo claims that the Hippo's document said the animal was a male.

Gravitas: After 7 year, Japan's male hippo turns out to be female

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Gravitas: After 7 year, Japan's male hippo turns out to be female