Steller's Sea Cow
Hydrodamalis gigas
Red List assessment
Extincton the IUCN Red List
- EXExtinct
- EWExtinct in the Wild
- CRCritically Endangered
- ENEndangered
- VUVulnerable
- NTNear Threatened
- LCLeast Concern
The IUCN Red List assesses the Steller's Sea Cow as Extinct.
- Genus
- Hydrodamalis
- Red List category
- Extinct
- Data updated
- August 9, 2026
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The Steller's Sea Cow is one of the mammals assessed by the IUCN Red List, so it has a page here — with its scientific name, Hydrodamalis gigas, its conservation category and, where one is known, a recorded observation on the map. What is missing is the rest: habitat, distribution, diet, behaviour, threats and the conservation work under way.
Each profile is researched and checked one species at a time, and there are thousands to go. You can put this one at the front of the queue.
In the meantime, the full assessment is on the IUCN Red List.
Questions about the Steller's Sea Cow
Is the Steller's Sea Cow endangered?
The IUCN Red List assesses the Steller's Sea Cow as Extinct. No reasonable doubt remains that the last individual has died. A species is only declared Extinct after exhaustive surveys of its known range, at the times and in the seasons it would be expected to appear, have failed to record it.
What is the scientific name of the Steller's Sea Cow?
The Steller's Sea Cow is Hydrodamalis gigas.
Sources
Conservation status, range description and population estimate come from the IUCN Red List assessment for Hydrodamalis gigas. Countries are derived from that range description, not from a mapped country list. Last refreshed on .