Tony Deng is the proud father of Moo-Deng, the famous baby pygmy hippopotamus born at the Khao Kheow Open Zoo in Thailand. While not as widely recognized as his daughter, Tony Deng plays an important role in Moo-Deng's lineage as the father of the seventh calf born to him and his mate, Jona. His offspring, especially Moo-Deng, have become internet sensations due to their playful behavior and viral photos.