Sea Otter
Enhydra lutris · Mammal, Vertebrate, Warm-blooded, Wild
Animal Family
Family Mustelidae, Order Carnivora, Class Mammalia
Animal Category
Marine Animal, Wild Predator, Endangered Species
Breed / Variety
Southern Sea Otter (Enhydra lutris nereis)
Conservation Status
Endangered (IUCN Red List). Population is stable but vulnerable to oil spills, habitat loss, and predation by Great White Sharks and Orcas.
About This Creature
Large aquatic weasel with a thick, bulky body, massive head, and powerful tail. They range from 1 to 1.5 meters in length and weigh 14 to 45 kg. Fur is dark brown with a lighter, often greyish or yellowish-white head and neck in older individuals.
Physical Characteristics
Densely packed waterproof fur (the densest in the animal kingdom), webbed hind feet for swimming, retractable claws on front paws, and a flattened tail. Large sensitive whiskers (vibrissae) for detecting prey. Lack of blubber, relying on air trapped in fur for insulation.
Behavior & Temperament
Social but largely segregated by sex into groups called 'rafts'. Diurnal, spending much of the day foraging and grooming. Known for floating on their backs and using rocks as tools to break shells. Highly intelligent and playful.
Habitat & Diet
Origin Region
Native to the coasts of the Northern and Eastern North Pacific Ocean; commonly found in California, Alaska, and Russia.
Habitat
Ocean/Marine, specifically nearshore environments, kelp forests, and rocky reefs. Primarily aquatic/semi-aquatic.
Diet & Nutrition
Carnivore. Primary food sources include sea urchins, abalone, mussels, clams, crabs, and snails. They are known for high metabolic rates, consuming 25-30% of their body weight daily. Forage by diving to the sea floor.
Lifespan & Health
Lifespan is 10-15 years in the wild, up to 20+ years in captivity. Common health issues include shark bites, parasites (Toxoplasma gondii), and oil spills. Females reach maturity at 3-4 years; usually produce one pup per year.
Special Characteristics
Unique tool-using ability; they have 'pockets' of skin under their forelegs to store food and tools. Significant cultural icon in Pacific Northwest indigenous cultures. Extremely high danger from pollution due to reliance on clean fur for warmth.
Ecological Information
Keystone species. They control sea urchin populations, which prevents overgrazing of kelp forests. Kelp forests provide critical habitat and carbon sequestration, making otters vital for coastal ecosystem health.