Dabry's sturgeon

What it is

Dabry's sturgeon is a large freshwater fish with a blue-gray back and yellowish-white belly. It features five rows of bony plates called scutes along its body. The head is triangular with a long snout, and the mouth sits on the underside. Two pairs of barbels hang near the mouth. Adults can reach 2.5 metres in length, though most are smaller. This species belongs to the sturgeon family and is the type species of the genus Sinosturio.

Where it lives

This fish is endemic to China. Its primary habitat is the Yangtze River basin, including main channels, tributaries, and connected lakes. Historically, it also inhabited the Yellow River basin, with records there until the 1960s. By the late twentieth century, populations disappeared from the lower Yangtze. They became restricted to the upper reaches in Sichuan province. The fish prefers slow-moving waters with sandy or muddy bottoms.

How it lives

The sturgeon feeds on aquatic plants, invertebrates, and small fish. It is potamodromous, meaning it migrates within fresh water but does not enter the sea. Males spawn annually, while most females do not breed every year. The species moves along the river for spawning and feeding. Habitat fragmentation has severely limited its movement. Pollution from runoff and wastewater has further degraded its environment.

Breeding and life cycle

Spawning occurs mainly in the upper Yangtze during March and April, with some activity in November and December. Females produce between 57,000 and 102,000 eggs. Dams like Gezhouba and Three Gorges blocked historical migration routes. Captive breeding began in the 1970s. In 2025, scientists confirmed the first wild reproduction after releasing captive-bred individuals. Hatchlings were spotted in April 2025, proving reintroduction potential.

Fish and people

This sturgeon was once a commercially important food fish. Overharvesting, especially of juveniles, contributed to its decline. Commercial harvest was banned in 1988 when it was listed as endangered in China. Thousands of captive-bred fish have been released into the Yangtze. In June 2024, over 800,000 individuals were released near Yibin. These efforts aim to prevent total extinction and restore wild populations.

Status and threats

The International Union for Conservation of Nature declared the species extinct in the wild in July 2022. Major threats included overfishing, dam construction, and pollution. The Gezhouba and Three Gorges Dams caused habitat fragmentation. Despite the extinction status, captive breeding programmes continue. Recent confirmation of wild spawning in 2025 suggests that restocking efforts may be succeeding in re-establishing a breeding population.

Questions people ask about Dabry's sturgeon

Good reading and sources

• Dabry's sturgeon on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data