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A. transmontanus is distinguished by the two rows of four to eight ganoid bony plates between the anus and anal fin, with about 45 rays present in the dorsal fin. Coloring can range from gray to brownish on the dorsal side, paler on the ventral side, and gray fins. Barbels are situated anterior to the mouth, closer to the snout than the mouth.
At sexual maturity, A. transmontanus can reach 1.6 m (5.2 ft) in length, while the maximum length recorded of any age class is 6.1 m (20 ft), with common lengths around 2.1 m (6.9 ft). While age at maturity is uncertain, possible age ranges of known A. transmontanus specimens range from 11–34 years old. The maximum published weight known was 816 kg (1,799 lb) with a reported age of 104 years. Learn more about White Sturgeon
View related species in family group: Sturgeon
Animalia: Chordata: Acipenseriformes: Actinopterygii: Acipenseridae: Acipenser transmontanus