Fauna
Species

White Sturgeon

Acipenser transmontanus

Also known as Pacific Sturgeon, Columbia Sturgeon, Oregon Sturgeon, Sacramento Sturgeon

White sturgeon are North America's largest freshwater fish, easily recognized by their shark-like profile, prominent bony scutes, and sensitive barbels used to locate food along dark river bottoms. These ancient giants spend decades moving between estuaries, coastal oceans, and deep river channels before returning to swift river currents to spawn. Slow growth and late maturity make them exceptionally vulnerable to river damming, overfishing, and habitat loss.

PrehistoricAnadromousRiver Giant
White Sturgeon reference1 / 3
Oregon Department of Fish & Wildlife / CC BY-SA 2.0 · cc-by-sa
—observations
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VulnerableConservation statusIUCN Red List categoriesLCNTVUENCREWEXVulnerableRed List categories, explained →
Key facts
Diet & preyChinook Salmon, Dungeness Crabs, Clams
Predators
  • California Sea Lions
  • Orcas
  • Humans
ThreatsDams, habitat degradation, historical overfishing, pollution
HabitatsLarge rivers, estuaries, bays, and coastal Pacific marine waters
Life span80–100+ years
Classification
  1. OrderAcipenseriformes
  2. FamilyAcipenseridae
  3. GenusAcipenser
  4. SpeciesAcipenser transmontanus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Massive size and powerful thrashing can cause injury if landed; observe safely from boats or shore.
What to notice
Recognize by five rows of bony plates, a broad snout with four barbels, and massive size.
Support conservation
Keep landed fish submerged in water and release immediately without lifting by the tail or gills.
Responsible observation
  • Responsible Angling: Use barbless single hooks and keep large fish submerged during handling.
  • River Watching: Scan deep river bends and tailraces below dams during spring spawning migrations.
  • Habitat Conservation: Support flow management initiatives that clear barriers for migratory fish.
Related species
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