Head to head
Eurasian Otter vs Sea Otter
The Eurasian otter and sea otter are both otters that have rebounded from serious historical declines, but their habitat, diet, and recovery status differ sharply.
| Eurasian Otter | Sea Otter | |
|---|---|---|
| Scientific name | Lutra lutra | Enhydra lutris |
| Primary habitat | Rivers, wetlands | Ocean, kelp forests |
| Tool use | Not documented | Uses a stone as a tool to crack shellfish |
| Historical threat | Pesticide pollution | Fur trade |
| Ecological role | Water-quality indicator species | Keystone species protecting kelp forests |
| Conservation status | Least Concern | Endangered |
| Population trend | Increasing | Increasing |
| Habitat | Wetlands, coastal | Coastal, ocean |
Eurasian Otter vs Sea Otter: common questions
Which otter is more endangered, the Eurasian otter or the sea otter?
The sea otter is more endangered, still classified as Endangered despite recovering from a low of only a few thousand individuals after the fur trade, while the Eurasian otter has recovered enough to be classified as Least Concern.
Does the Eurasian otter use tools like the sea otter?
No, tool use is not documented in the Eurasian otter, while the sea otter is one of the few mammals that habitually uses a tool, balancing a stone on its chest to crack open shellfish.
How do the Eurasian otter and sea otter each help their ecosystems?
The Eurasian otter serves as an indicator of healthy river water quality, while the sea otter acts as a keystone species by controlling sea urchin numbers that would otherwise destroy kelp forests, two very different but equally important ecological roles.