Sea Otter
The sea otter (*Enhydra lutris*) is a marine mammal in the weasel family, native to coastal waters of the North Pacific.
The sea otter (Enhydra lutris) is a marine mammal in the weasel family, native to coastal waters of the North Pacific. It is known for its dense fur, use of tools, and role as a keystone species in kelp forest ecosystems. Sea otters were heavily hunted for fur and remain a conservation concern in parts of their range.
Taxonomy and description
Sea otters are marine mammals in the family Mustelidae, with the scientific name Enhydra lutris. They are adapted to life in cold coastal waters and have webbed hind feet, a muscular tail, and exceptionally dense fur.
Distribution and habitat
Sea otters occur along the coasts of the North Pacific Ocean in North America and Asia. They typically live in shallow nearshore waters, often associated with rocky shores and kelp forests.
Behaviour and diet
Sea otters are known for floating on their backs, using tools to open hard-shelled prey, and wrapping themselves in kelp to avoid drifting. Their diet includes sea urchins, mollusks, crustaceans, octopuses, squid, and fish.
Conservation
Sea otters were hunted to near extinction during the fur trade. While populations have recovered in some areas, others remain vulnerable, and conservation status varies by region.
Key facts
- Sea otters are the heaviest members of the weasel family and one of the smallest marine mammals.
- They rely on extremely dense fur rather than blubber for insulation.
- Sea otters live in shallow nearshore waters and often forage on the sea floor.
- Their diet includes sea urchins, mollusks, crustaceans, octopuses, squid, and fish.
- They are considered a keystone species because they help maintain kelp forest ecosystems.
Sea otters occur in British Columbia, where they were reintroduced after being extirpated locally. They are a well-known species for Canadian marine conservation and coastal ecosystem management.
Frequently asked questions
What is the scientific name of the sea otter?
Where do sea otters live?
What do sea otters eat?
Why are sea otters important to ecosystems?
How do sea otters stay warm?
Are sea otters endangered?
References
- National Geographic Kids — https://kids.nationalgeographic.com/animals/mammals/facts/sea-otterSupports: Scientific name, diet, lifespan, size, and historical overhunting
- Marine Mammal Research Unit, University of British Columbia — https://mmru.ubc.ca/biology/sea-otter-biology/Supports: Subspecies, habitat, range, body size, population estimates, and Canadian conservation status
- U.S. National Park Service — https://www.nps.gov/places/sea-otter.htmSupports: Conservation context and endangered status discussion
- Defenders of Wildlife — https://www.defenders.org/wildlife/sea-otterSupports: Keystone species status and North Pacific habitat
- The Marine Mammal Center — https://www.marinemammalcenter.org/animal-care/learn-about-marine-mammals/sea-ottersSupports: Fur density, body size, and marine mammal characteristics
- Alaska Department of Fish and Game — https://www.adfg.alaska.gov/index.cfm?adfg=viewing.marinemammals&species=seaotterSupports: Habitat, size, and behaviour