鳇（学名：Huso dauricus，称作“达氏鳇”）为鲟科鳇属的鱼类，俗名鳇鱼。最大可长达5.6米、重达1000千克以上。分布于前苏联地区以及黑龙江中游、乌苏里江、松花江、嫩江下游等，多栖息于淡水以及砾粒质水底和沙质水底。该物种的模式产地在黑龙江、****、石勒喀河、鄂嫩河。

鳇鱼习性凶猛，嗜食，饥饿时会撕咬同类。人工繁殖技术在1950年代即被黑龙江省水产部门攻克。生长迅速，但必须长到50市斤以上肉质才好吃，因此罕有商业养殖鳇鱼的。但常见以母本为鳇鱼，父本为鲟鱼养殖的杂交品种的鲟鳇鱼，既有鳇鱼生长迅速优点，又有鲟鱼肉质好的优点。

The kaluga (Huso dauricus) is a large predatory sturgeon found in the Amur River basin. Also known as the river beluga, they are claimed to be the largest freshwater fish in the world, with a maximum size of at least 1,000 kg (2,205 lb) and 5.6 m (18.6 ft). Local fishermen have suggested that the kaluga can grow well up to 20 ft in length and can weigh around 1,500 kg. The kaluga is one of the biggest of the sturgeon family. Like the slightly larger beluga, it spends part of its life in salt water. Unlike the beluga, this fish has 5 major rows of dermal scutes, nail-like teeth in its jaws, and feeds on salmon and other fish in the Amur. They have gray-green to black backs with a yellowish green-white underbelly.