Green sturgeon are highly migratory in the ocean. Acipenser medirostris , acipenser is an old world name for sturgeon and medirostris meaning moderate snout. Sakhalin sturgeon or sterlyad sturgeon. The green sturgeon is a primitive, bottom dwelling fish. It is characterized by its large size and long round body.
Scutes are actually large modified scales, that serve as a type of armor or protection.
The dorsal body color is a dark olive-green, with the ventral surface a lighter whitish green, with the scutes having a lighter coloration than the body. Green sturgeon can reach 7 feet in length and weigh up to 350 pounds. Very little is know about the green sturgeon's life history. The green sturgeon is an anadromous fish that spends most of its life in salt water and returns to spawn in fresh water. It is a slow growing and late maturing fish that apparently spawns every 4 to 11 years during the spring and summer months.