Harbor Seal
Phoca vitulina · Mammal, Vertebrate, Warm-blooded, Wild
Animal Family
Phocidae, order Carnivora, class Mammalia
Animal Category
Marine Animal
Breed / Variety
Eastern Pacific Harbor Seal (Phoca vitulina richardsi)
Conservation Status
IUCN Red List status is Least Concern with a stable population trend. Protected under the Marine Mammal Protection Act in the United States; threats include entanglement in fishing gear, habitat disturbance, and pollution.
About This Creature
Streamlined, spindle-shaped body with a rounded head, short snout, and no external ear flaps. Typically ranges from 1.2 to 1.8 meters in length and weighs between 55 to 130 kg. Coat color varies from brownish-grey to tan or silver with distinctive dark spots or rings.
Physical Characteristics
Pinniped body structure with flippers adapted for swimming (hind flippers used for propulsion, front flippers for steering). Large, dark, expressive eyes positioned forward, prominent vibrissae (whiskers) used for tactile sensing underwater, thick blubber layer for insulation, and short fur.
Behavior & Temperament
Semi-social animals that haul out in groups to rest but are largely solitary while foraging. Diurnal activity patterns closely tied to tidal cycles. Communicate through grunts, growls, and snorts. Excellent divers capable of remaining submerged for up to 30 minutes.
Habitat & Diet
Origin Region
Coastal waters of the Northern Hemisphere, including the North Atlantic and North Pacific oceans, thriving in temperate to subarctic climate zones
Habitat
Marine and coastal environments, hauling out on rocky shores, beaches, and ice floes; semi-aquatic and marine
Diet & Nutrition
Carnivorous diet consisting primarily of fish (such as cod, herring, and salmon), squid, and crustaceans. Forages by hunting underwater using acute vision and sensitive vibrissae to detect prey movements.
Lifespan & Health
Lifespan ranges from 20 to 30 years in the wild, longer in captivity. Common health issues include parasites and vulnerability to marine pollutants and viral infections. Natural predators include killer whales and great white sharks. Females give birth to a single pup annually.
Special Characteristics
Possesses highly sensitive vibrissae that can detect hydrodynamic trails left by swimming fish. Highly streamlined body allows for efficient swimming speeds. Lacks external ear flaps, distinguishing true seals (Phocidae) from fur seals and sea lions.
Ecological Information
Occupies a mid-to-high trophic level as a marine predator, helping regulate fish and invertebrate populations. Serves as an important prey species for apex predators like killer whales and sharks, contributing to the health of nearshore marine ecosystems.