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Acipenser is a genus of sturgeons.With 17 living species (others are only known from fossil remains), it is the largest genus in the order Acipenseriformes.The genus is paraphyletic, containing all sturgeons that do not belong to Huso, Scaphirhynchus, or Pseudoscaphirhynchus, with many species more closely related to the other three genera than they are to other species of Acipenser.
Genus †Protoscaphirhynchus Wilimovsky, 1956; Genus † Engdahlichthys Murray et al. 2020; Genus †Anchiacipenser Sato, Murray, Vernygora and Currie, 2019; Genus †Priscosturion Grande & Hilton, 2009 [Psammorhynchus Grande & Hilton, 2006] Genus Acipenser Linnaeus, 1758; Genus Huso J. F. Brandt & Ratzeburg, 1833; Genus Scaphirhynchus Heckel, 1835
However, some species have evolved purely freshwater existences, such as the lake sturgeon (Acipenser fulvescens) and the Baikal sturgeon (A. baerii baicalensis), or have been forced into them by human or natural impoundment of their native rivers, as in the case of some subpopulations of white sturgeon (A. transmontanus) in the Columbia River ...
An Atlantic sturgeon at the Aquarium du Québec. Rather than having true scales, the Atlantic sturgeon has five rows of bony plates known as scutes.Specimens weighing over 800 lb and nearly 15 ft in length have been recorded, but they typically grow to be 6–8 ft (1.8–2.4 m) and no more than 300 lb (140 kg).
White sturgeon (Acipenser transmontanus) is a species of sturgeon in the family Acipenseridae of the order Acipenseriformes. They are an anadromous (migratory) fish species ranging in the Eastern Pacific; from the Gulf of Alaska to Monterey, California .
The Russian sturgeon (Acipenser gueldenstaedtii), also known as the diamond sturgeon or Danube sturgeon, is a species of fish in the family Acipenseridae.It is found in Azerbaijan, Bulgaria, Georgia, Iran, Kazakhstan, Romania, Russia, Turkey, Turkmenistan, and Ukraine.
The Siberian sturgeon (Acipenser baerii) is a species of sturgeon in the family Acipenseridae.It is most present in all of the major Siberian river basins that drain northward into the Kara, Laptev and East Siberian Seas, including the Ob, Yenisei (which drains Lake Baikal via the Angara River) Lena, and Kolyma Rivers.
Acipenser oxyrinchus can grow to a length of 14 ft (4.3 m) and a weight of 800 lb (360 kg). The lifespan of this species can be around 60 years. The lifespan of this species can be around 60 years. The color of Acipenser oxyrinchus is bluish-black or olive brown with lighter sides and a white belly.