Chinese, Yangtze and Sakhalin Sturgeon: Asia's Endangered Species

In 1981, Gezhouba Dam cut the Chinese sturgeon's route to its upstream spawning grounds.

Chinese, Yangtze and Sakhalin sturgeons tell three distinct stories of survival in Asia. Chinese and Sakhalin sturgeons are Critically Endangered, while the Yangtze sturgeon was listed as Extinct in the Wild in 2022, kept from extinction altogether by captive breeding. None of these names simply means sturgeon farmed for caviar in China.

Species at a glance

These are conservation profiles, not buying guides. Conservation breeding and commercial caviar production serve different purposes; this page offers no route to purchase.

Chinese sturgeon: a journey interrupted

The Chinese sturgeon, Acipenser sinensis, is anadromous, growing at sea before entering freshwater to reproduce. Its survival depends on a connected chain of spawning grounds, downstream nursery habitat, estuary and coastal feeding waters. Protecting one stretch of river cannot secure that entire life cycle.

After Gezhouba Dam blocked access upstream, fish used spawning grounds below it. The Three Gorges project brought further changes to river flow and temperature. Spawning habitat research examines how those conditions work together: the question is more complex than how much water passes a dam.

Artificial breeding and releases aim to support a depleted population, but the decisive test comes afterwards. Released fish must survive, complete their migrations and produce offspring capable of surviving in the river and sea. Counting releases alone cannot establish recovery.

In June 2026, the National Engineering Research Center for Ecological Environment of the Yangtze River Economic Belt described controlled spawning trials at Yanzhiba in November and December 2025. These experiments are part of active restoration, rather than evidence that an independent wild population has recovered.

Yangtze sturgeon: surviving beyond the wild

The Yangtze sturgeon survives, but its 2022 assessment found no evidence of a self-sustaining wild population. Acipenser dabryanus, also called Dabry's sturgeon, is a freshwater resident associated with the upper Yangtze and its tributaries. Unlike the Chinese sturgeon, it does not migrate between river and sea.

Chongqing's agriculture authority reports mature individuals measuring 0.75 to 1.05 metres and weighing 4.5 to 12.5 kg. Those figures describe mature fish, rather than the species' maximum size.

Extinct in the Wild does not mean that every individual has died. In the 2022 assessment, surviving Yangtze sturgeons depended on captive breeding and restocking. Its position differs fundamentally from that of the Chinese paddlefish, assessed as extinct.

Then came an encouraging result. In April 2025, the Chinese Academy of Sciences' Institute of Hydrobiology introduced 20 adults into a modified spawning area in the Chishui River. Researchers collected fertilised eggs, followed by newly hatched larvae, documenting reproduction after habitat preparation rather than simply another release of juveniles.

Extinct in the Wild does not mean that every individual has died.

That is a restoration milestone, though a population replacing itself across generations remains a different test. One successful spawning event does not automatically change the Red List category.

Sakhalin sturgeon: a Pacific survivor

The Sakhalin sturgeon's story belongs to the north-western Pacific. Acipenser mikadoi historically inhabited coastal waters and rivers around the Sea of Japan and Sea of Okhotsk, with the Tumnin River in Russia particularly important in modern research. Like the Chinese sturgeon, it is anadromous.

A 2020 study reported returning spawners with fork lengths of 1.35 to 1.69 metres and weights of 15 to 36 kg, including 29 length measurements. These figures describe the study sample, not the species' entire size range. The researchers also describe juveniles moving gradually through the estuary towards coastal waters as their tolerance of saltwater develops.

NOAA identifies accidental capture in salmon fisheries, illegal fishing during spawning migrations, and pollution from extractive industries and agriculture among the threats. Russia's 2021 federal Red Data Book includes the species, as researchers at the Russian Academy of Sciences confirm. That national listing is distinct from its global IUCN category.

Japan's 2020 national Red List classifies native sturgeon as extinct under Acipenser medirostris. Hokkaido's 2018 Red List likewise places its native sturgeon in the extinct category under that older name.

The names matter here. This historical Japanese usage must be distinguished from the separate North American green sturgeon. Regional extinction in Japan does not mean the Sakhalin sturgeon is globally extinct.

Why protection needs more than a fishing ban

A fishing ban can spare an adult sturgeon. It cannot reopen a blocked migration route or rebuild a damaged spawning bed.

Overfishing removed adults before they could reproduce, while dams fragmented habitat and changed spawning conditions. Pollution, vessel traffic and other river development add further pressure in the Yangtze. A long-distance migrant and a freshwater resident experience these changes differently, so restoration must address the life cycle of each species.

China's national protected wildlife list places both Chinese and Yangtze sturgeons in Class I. The Yangtze River Protection Law took effect on 1 March 2021, providing a wider framework for habitat protection, ecological flows, pollution control and fishing restrictions. These are conservation measures within China, not permission for international trade.

The ten-year fishing ban expanded from aquatic reserves in 2020 to the Yangtze main stream, important tributaries and major connected lakes from 1 January 2021. Its reach is substantial, but it does not close every waterbody throughout China.

How to recognise them

Look for an elongated body, conspicuous bony plates and a mouth on the underside. Those plates are scutes, arranged along the body: characteristic sturgeon features that help distinguish a sturgeon from other fish.

Separating these three species requires more than those shared family features, which alone do not reliably distinguish them in an unlabelled photograph. Use documented locality, verified scientific identification and diagnostic anatomical characters, supported by genetic work where necessary.

Neither a fish's size nor the colour of its eggs establishes its identity. Start with the sturgeon species guide to understand the distinctions and the evidence needed to make them.

Chinese sturgeon vs sturgeon farmed in China

Chinese sturgeon is a species; sturgeon farmed in China describes a production location. The distinction is simple, and essential.

FAO's account of China's caviar industry documents Siberian sturgeon, Amur sturgeon and hybrids, including crosses between kaluga and Amur sturgeon. None is an alternative name for Chinese sturgeon, Acipenser sinensis, or for Yangtze sturgeon.

One documented aquaculture cross pairs a female kaluga, Huso dauricus, with a male Amur sturgeon, Acipenser schrenckii. Nor are all sturgeons farmed in China foreign to the country: kaluga and Amur sturgeon belong to the Amur basin, shared by China and Russia. Where a fish originates, which species it belongs to and whether it was bred in captivity are separate questions.

On a menu, Chinese caviar may indicate where the caviar was produced, whereas Chinese sturgeon is a claim about the fish itself. Treating the phrases as interchangeable confuses a farming industry with a threatened species.

For the production story, read China's caviar industry. These conservation profiles concern the survival of the fish, rather than the selection of a product.

Names, codes and conservation status

CITES lists all three species in Appendix II, regulating international trade rather than setting a uniform domestic sales law. The species codes are SIN for Chinese sturgeon, DAB for Yangtze sturgeon and MIK for Sakhalin sturgeon. They identify species within the system; they do not establish that commercial caviar from those fish is available or lawful.

A CITES label supplies traceability information. It cannot independently verify the species inside a container, and domestic wildlife protection and the importing country's rules remain separate requirements. The codes here are identification references, not sourcing guidance for protected fish or their eggs.

Alternative classifications use Sinosturio sinensis, Sinosturio dabryanus and Sinosturio mikadoi. This article follows the Acipenser names used by CITES. The World Register of Marine Species currently treats those Sinosturio combinations as Acipenser: a change of genus name does not, by itself, identify a different fish.

Red List categories describe assessed extinction risk, not commercial grades or a species' usefulness to people.Conservation success is measured in functioning populations and habitat, not simply in the continued existence of fish in captivity.