MKS sports the oldest hippo in Poland, celebrates its 39th birthday at Warsaw Zoo in Warsaw, Poland on Sept. 19, 2024. (Photo: Xinhua)" src="https://www.globaltimes.cn/Portals/0/attachment/2024/2024-09-20/1f8a9e61-9209-4a14-9501-45680f9dc436.jpeg" />

Pelagia, the oldest hippo in Poland, celebrates its 39th birthday at Warsaw Zoo in Warsaw, Poland on Sept. 19, 2024. (Photo: Xinhua)

Pelagia, the oldest hippo in Poland, celebrates its 39th birthday at Warsaw Zoo in Warsaw, Poland on Sept. 19, 2024. (Photo: Xinhua)

Pelagia, the oldest hippo in Poland, celebrates its 39th birthday at Warsaw Zoo in Warsaw, Poland on Sept. 19, 2024. (Photo: Xinhua)

Pelagia, the oldest hippo in Poland, celebrates its 39th birthday at Warsaw Zoo in Warsaw, Poland on Sept. 19, 2024. (Photo: Xinhua)