Amur sturgeon
| Japanese sturgeon | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Acipenseriformes |
| Family: | Acipenseridae |
| Genus: | Sinosturio |
| Species: | S. schrenckii |
| Binomial name | |
| Sinosturio schrenckii (von Brandt, 1869) | |
| Synonyms | |
| |
The Amur sturgeon or Japanese sturgeon (Sinosturio schrenckii) is a species of fish in the family Acipenseridae found in the Amur River basin in China and Russia. They migrate outwards to the Sea of Japan and the Sea of Okhotsk. The species has 11–16 dorsal, 34–47 lateral, and 7–16 ventral scutes. Their dorsal fins have 38–53 rays and 20–35 anal fin rays. They also have greyish-brown backs and pale ventral sides. The species can reach up to 3 metres (9.8 ft) in length, and weigh over 190 kilograms (420 lb). The species is considered to be critically endangered.
Prior to 2025, it was placed in the genus Acipenser. However, this placement was long known to be paraphyletic. In 2025, it was moved to the revived genus Sinosturio.