A Chinese white dolphin playing and performing during an event at the Chimelong Ocean Kingdom in Zhuhai, Guangdong Province, in a photo taken on Saturday, April 27, 2019. Hailed as "mermaids" and "giant pandas in the sea," the Chinese white dolphins often appear in the East China Sea, and are guarded under first-class state protection in China. The event is part of an annual conservation campaign aimed at raising awareness about this endangered species hosted by Chinese authorities. (Photos: IC)

Chinese white dolphins playing and performing during an event at the Chimelong Ocean Kingdom in Zhuhai, Guangdong Province, in a photo taken on Saturday, April 27, 2019. Hailed as "mermaids" and "giant pandas in the sea," the Chinese white dolphins often appear in the East China Sea, and are guarded under first-class state protection in China. The event is part of an annual conservation campaign aimed at raising awareness about this endangered species hosted by Chinese authorities.

A Chinese white dolphin playing and performing during an event at the Chimelong Ocean Kingdom in Zhuhai, Guangdong Province, in a photo taken on Saturday, April 27, 2019. Hailed as "mermaids" and "giant pandas in the sea," the Chinese white dolphins often appear in the East China Sea, and are guarded under first-class state protection in China. The event is part of an annual conservation campaign aimed at raising awareness about this endangered species hosted by Chinese authorities.

Chinese white dolphins playing and performing during an event at the Chimelong Ocean Kingdom in Zhuhai, Guangdong Province, in a photo taken on Saturday, April 27, 2019. Hailed as "mermaids" and "giant pandas in the sea," the Chinese white dolphins often appear in the East China Sea, and are guarded under first-class state protection in China. The event is part of an annual conservation campaign aimed at raising awareness about this endangered species hosted by Chinese authorities.