The Last Cetacean of the Yangtze, After the Baiji's Extinction
The Yangtze finless porpoise is the only remaining cetacean in China's Yangtze River — the world's third-longest river — following the functional extinction of the baiji (Yangtze river dolphin, Lipotes vexillifer), declared after a 2006 survey failed to find a single individual, making it the first cetacean driven extinct by human activity in modern times. The finless porpoise is the baiji's ecological successor in tragedy and in hope: it is listed by the IUCN as Critically Endangered, but unlike the baiji its decline appears to have been arrested and possibly reversed by intensive recent conservation, with a 2022 survey estimating approximately 1,249 individuals — a modest increase over the 2017 estimate [Mei et al. 2021; China Ministry of Agriculture and Rural Affairs 2022].
The contrast between the baiji (lost) and the finless porpoise (recovering) is the central lesson: the same river, the same threats, but earlier and more intensive intervention for the porpoise.
Biology and identification
The Yangtze finless porpoise is a small cetacean — adults reach approximately 1.5–1.9 m and 30–45 kg [Wang 2009]. As the common name indicates, it lacks a dorsal fin (replaced by a low ridge of tubercles along the back). It has a rounded, beakless head, a dark grey body, and a notably expressive face that has made it a charismatic conservation symbol in China ("the smiling angel of the Yangtze," for its upturned mouthline).
It is the only freshwater population of finless porpoise in the world — other finless porpoise subspecies are marine/estuarine. The Yangtze subspecies is genetically and ecologically distinct, fully adapted to the turbid freshwater river environment, navigating and hunting fish by echolocation in near-zero visibility.
Reproduction is slow: females produce a single calf roughly every two years after a ~11-month gestation, with calves dependent for 6+ months. This low reproductive rate means the population can rebuild only slowly even under good conditions.
Habitat and range
Endemic to the middle and lower Yangtze River and two connected lakes — Poyang Lake and Dongting Lake — in China [Mei et al. 2021]. The historical range extended further up and down the river system; the population is now concentrated in specific river reaches and the two large lakes, with Poyang Lake holding the largest single subpopulation.
The Yangtze is one of the most heavily-modified large rivers on Earth: dammed (the Three Gorges Dam and many others), dredged, channelised, intensively fished, and carrying enormous commercial vessel traffic. Every one of these modifications affects the porpoise.
Conservation status
The Yangtze finless porpoise is listed as Critically Endangered on the IUCN Red List [Mei et al. 2021]. China elevated it to first-class national protected species status in 2021 (the highest level). The 2022 government-led survey estimated approximately 1,249 individuals, up modestly from the 2017 estimate (~1,012) — the first documented population increase, attributed to intensive recent conservation including the landmark Yangtze fishing ban [China MARA 2022].
Threats
Prey depletion from overfishing was a principal driver of decline. The Yangtze was so intensively fished that the porpoise's food base collapsed in many reaches. In January 2021 China implemented a 10-year complete fishing ban on the main stem of the Yangtze and its major tributaries and lakes — removing roughly 100,000 fishing vessels and retraining over 200,000 fishers — the largest freshwater fishing moratorium ever enacted [China MARA 2021]. Early indications are that fish stocks (and therefore the porpoise's food base) are recovering, which is the most-likely explanation for the porpoise's modest rebound.
Vessel strikes and underwater noise — the Yangtze carries among the heaviest inland-waterway vessel traffic in the world. Ship strikes kill porpoises directly, and the constant underwater noise interferes with the echolocation the animals depend on to navigate and hunt in zero-visibility water.
Habitat modification by dams and channelisation — the Three Gorges Dam and other infrastructure altered the river's flow, sediment regime, and connectivity between the river and the lakes (Poyang and Dongting), affecting fish spawning and porpoise habitat. Sand mining in Poyang Lake is a documented additional pressure.
Pollution — industrial, agricultural, and urban pollution along the densely-populated Yangtze corridor affects water quality and the food chain.
Bycatch — entanglement in fishing gear (now reduced by the fishing ban) historically killed porpoises directly.
What is being done
- The 10-year Yangtze fishing ban (2021–2030) — the single largest conservation intervention, removing the overfishing that depleted the porpoise's food base. This is widely credited with the early signs of population recovery.
- First-class national protected species status (2021) — the highest legal protection in China.
- Ex-situ "oxbow" reserves — the most distinctive Chinese conservation strategy: relocating porpoises into semi-natural oxbow lakes (former river channels now disconnected from the main stem), notably the Tian'ezhou Oxbow Reserve, where a managed population has grown and successfully bred, providing an insurance population and a source for reintroduction. This ex-situ approach was developed partly in response to the lesson of the baiji's extinction (an attempt to establish a baiji oxbow population came too late).
- The Institute of Hydrobiology, Chinese Academy of Sciences — the principal scientific body, which conducts the population surveys, acoustic monitoring, and ex-situ breeding research.
- WWF China and domestic NGOs — support habitat protection, the oxbow reserves, and public-awareness campaigns leveraging the porpoise's "smiling angel" charisma.
How readers can help
- Support WWF China and the Institute of Hydrobiology's porpoise work. International support reinforces the ex-situ reserve program and population monitoring.
- Support the broader Yangtze restoration. The fishing ban and river-health work benefit the entire Yangtze ecosystem; organizations and policy supporting the moratorium's continuation through 2030 and beyond are the highest-leverage support.
- Learn and share the baiji-vs-porpoise contrast. The baiji was lost because intervention came too late; the finless porpoise is recovering because intervention (especially the fishing ban and ex-situ reserves) came while a viable population remained. This is the generalizable lesson for currently-declining freshwater species worldwide — including the river dolphins of the Amazon, Ganges, Indus, and Mekong, all of which face similar pressures.
- Support freshwater-cetacean conservation globally. The Yangtze finless porpoise's situation parallels that of other threatened river cetaceans; organizations working on the Ganges/Indus river dolphins, Amazon river dolphins (botos), and Mekong Irrawaddy dolphins address the same class of threat.
- Reduce consumption-driven pollution and support water-quality regulation in any river system — the porpoise's plight is a vivid illustration of what intensive river exploitation does to apex freshwater species.
Last verified: 2026-05-24 Conservation status: Critically Endangered (IUCN Red List 2021 assessment); ~1,249 individuals (2022 survey, a modest increase); first-class protected in China.
References
- China Ministry of Agriculture and Rural Affairs (2021). Notice on the 10-year fishing ban in key waters of the Yangtze River. Beijing.
- China Ministry of Agriculture and Rural Affairs (2022). Results of the 2022 Yangtze Finless Porpoise Survey. Beijing.
- Mei, Z., Cheng, P., Wang, K., Wei, Q., Barlow, J., & Wang, D. (2021). Neophocaena asiaeorientalis ssp. asiaeorientalis. IUCN Red List of Threatened Species. e.T43205774A45893487.
- Wang, D. (2009). Population status, threats and conservation of the Yangtze finless porpoise. Chinese Science Bulletin 54: 3473–3484.