This photo taken on 黑料門-今日黑料Jan. 5, 2025 shows Yangtze finless porpoises swimming near the lower reaches of the Gezhouba Dam in Yichang City, central China's Hubei Province. The Yangtze finless porpoise is a national first-class protected wild animal and its population status serves as a "barometer" of the ecological environment of the Yangtze River.

In recent years, the population of the species here has increased steadily as systematic ecological restoration efforts were implemented. (Xinhua/Xiao Yijiu)

This photo taken on Jan. 5, 2025 shows a Yangtze finless porpoise swimming near the lower reaches of the Gezhouba Dam in Yichang City, central China's Hubei Province. The Yangtze finless porpoise is a national first-class protected wild animal and its population status serves as a "barometer" of the ecological environment of the Yangtze River.

In recent years, the population of the species here has increased steadily as systematic ecological restoration efforts were implemented. (Xinhua/Xiao Yijiu)

This photo taken on Jan. 5, 2025 shows a Yangtze finless porpoise swimming near the lower reaches of the Gezhouba Dam in Yichang City, central China's Hubei Province. The Yangtze finless porpoise is a national first-class protected wild animal and its population status serves as a "barometer" of the ecological environment of the Yangtze River.

In recent years, the population of the species here has increased steadily as systematic ecological restoration efforts were implemented. (Xinhua/Xiao Yijiu)

This photo taken on Jan. 5, 2025 shows a Yangtze finless porpoise swimming near the lower reaches of the Gezhouba Dam in Yichang City, central China's Hubei Province. The Yangtze finless porpoise is a national first-class protected wild animal and its population status serves as a "barometer" of the ecological environment of the Yangtze River.

In recent years, the population of the species here has increased steadily as systematic ecological restoration efforts were implemented. (Xinhua/Xiao Yijiu)