The Extinct Chinese Paddlefish (Psephurus gladius)

A Chinese paddlefish exceeding 7 m appears in Zhang and colleagues' 2016 review: a vast predator with a narrow snout drawn to a blade-like point. Yet the last confirmed records of Psephurus gladius date from 2003. Researchers estimate that it disappeared between 2005 and 2010; IUCN formally confirmed its extinction in the Red List update published on 21 July 2022.

Species at a glance

Common names: Chinese paddlefish; Chinese swordfish ⁵

Scientific name: Psephurus gladius (Martens, 1862) ⁹

Recorded synonyms: Polyodon gladius; Spatularia (Polyodon) angustifolium ⁹

Family: Polyodontidae, the paddlefishes ⁹

CITES listing: Appendix II, effective 1 April 1998; code GLA recorded in 2002 ^7,8

IUCN Red List: Extinct (EX), assessed in 2019 and published in 2022, according to IUCN ¹.

Range: Yangtze River system and adjoining Chinese coastal waters ⁴

Last confirmed records: December 2002 and January 2003 ⁴

How to recognise the Chinese paddlefish

The snout was the unmistakable feature: narrow and pointed, rather than the broad paddle of its American relative. Historical descriptions reproduced by fisheries scientist Dennis L. Scarnecchia in 2023 give it a greyish-brown upper body, a whitish underside and an unevenly lobed tail, one lobe longer than the other.

This was a fish-eater, unlike the plankton-feeding American paddlefish. Scarnecchia's review records a female caught in April 1983 that measured 3.15 m and weighed 87 kg.

Its last stronghold was the Yangtze basin, including upstream spawning reaches around Yibin and the lower Jinsha River. Its range was broader than a short stretch of river: researchers also describe its use of inshore waters, although its migrations and population structure remain incompletely understood. For its place among related fishes, see the paddlefish and bowfin guide.

When did the Chinese paddlefish become extinct?

The last confirmed encounter came in 2003. The estimated extinction followed between 2005 and 2010. Formal confirmation arrived in 2022. These dates mark different stages of the loss, not competing accounts of when it happened.

Individual fish can live on after a population has lost the ability to replace itself.

The final confirmed captures were in December 2002 near Nanjing and January 2003 near Nanxi in the upper Yangtze. Later searches deployed nets, setlines and hydroacoustic equipment, which detects underwater targets through sound. Some acoustic returns were suggestive, but none established that a Chinese paddlefish had survived.

In Science of the Total Environment in 2020, Hui Zhang, Ivan Jarić, David L. Roberts and five colleagues brought together a basin-wide capture survey conducted in 2017 and 2018 and statistical analysis of 210 sighting records from 1981 to 2003. The survey found no Chinese paddlefish. Their analysis placed extinction between 2005 and 2010; it could not identify when the final individual died.

The deeper loss probably came earlier. The authors estimated that the population had probably become functionally extinct by 1993, meaning it could no longer reproduce successfully. Individual fish can live on after a population has lost the ability to replace itself.

IUCN's July 2022 update confirmed the species as Extinct, rather than Extinct in the Wild.For the Chinese paddlefish, there was no captive population left to support recovery.

Why it disappeared

Heavy fishing depleted the population. From 1981, the Gezhouba Dam blocked its migration route, separating fish from the habitat they needed to complete their life cycle. Together, these pressures undermined both survival and reproduction.

Pollution and wider habitat deterioration compounded the damage. A 2021 United Nations University report identifies dams, overfishing and pollution as connected drivers of the loss. The extinction was the result of interacting pressures, not a single final incident. Protecting individual fish was essential, but the river system needed protection too.

For the Chinese paddlefish, the central problem was stark: stopping capture alone could not reconnect a broken migration route.

Protection and rescue efforts

China granted the species top-level national protection in 1989, according to Zhang and colleagues' 2016 account.

The 1997 CITES listing proposal records protection stations in Hubei and Sichuan, alongside attempts at captive breeding. Those efforts were hampered by the difficulty of obtaining mature males and females together.

The Appendix II listing took effect on 1 April 1998 through the inclusion of the wider order Acipenseriformes. It regulated international wildlife trade; it neither restored spawning habitat nor established that the species was in commercial use.

Rescue surveys continued after the final captures, but no breeding population was secured. Set against the study's estimate that reproductive capacity had probably been lost by 1993, the later searches and international listing may have come after the population had passed the point of natural recovery.

A timeline of the loss

What its extinction teaches

In its response to the 2022 reassessment, the World Sturgeon Conservation Society emphasised that conservation programmes in North America had started before many populations reached the verge of extinction. The lesson is to act while functioning populations remain, not wait until the last fish becomes difficult to find.

For the Yangtze's surviving sturgeons, that means protecting successful reproduction and connected habitat, not simply counting sightings of adults. Their histories are distinct: the loss of the Chinese paddlefish does not mean that every related fish in the river has vanished. Read Asia's endangered sturgeons for those separate histories.