White Sturgeon Identification Guide
Identify a White Sturgeon by its huge size, pale gray-white body, and blunt rounded adult snout.
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Key identification features
- North America's largest freshwater fish, historically exceeding 15 feet
- Pale gray to grayish-white body with a whitish belly
- Bony scutes present in juveniles that become smoother and more embedded as the fish ages
- Snout is pointed in young fish but grows blunter and more rounded in large adults
- Four barbels set closer to the mouth than to the snout tip
- Heterocercal tail with a pronounced upper lobe
Common look-alikes
- Green sturgeon: distinguished by an olive-green cast and an extra row of enlarged scutes along the belly midline, plus a sharper, more slender snout than White Sturgeon.
- Atlantic sturgeon: similar body plan but found only on the Atlantic coast, never overlapping with White Sturgeon's Pacific range.
- Lake Sturgeon: smaller-bodied and strictly freshwater in the Great Lakes/Mississippi drainage, not the Pacific coast rivers White Sturgeon inhabit.
Where you'll see one
White Sturgeon live in large Pacific coast rivers, estuaries, and reservoirs from the Aleutian Islands south to central California, with the Fraser, Columbia, and Sacramento rivers holding the biggest populations. Some populations are anadromous while others remain landlocked in reservoirs behind dams.
Frequently asked questions
How do I tell a White Sturgeon from a Green Sturgeon?
Color and belly scutes separate them: White Sturgeon are pale gray-white with a blunt snout, while Green Sturgeon show an olive-green tint and an extra row of scutes running down the belly.
How can I estimate whether a sturgeon is a White Sturgeon based on size alone?
Size is a strong clue on the Pacific coast — White Sturgeon regularly exceed 6 feet and can reach over 15 feet, far larger than any other North American sturgeon sharing that range.