Common Seal vs Polar bear

Phoca vitulina compared with Ursus maritimus

Key Differences

• Common Seal is Near Threatened while Polar bear is Vulnerable.
• Polar bear is 5.6x heavier than Common Seal.
• Common Seal lives longer (30 years vs 25 years).

Taxonomic Classification

Rank	Common Seal	Polar bear
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Pinnipedia (Seals & Sea Lions)	Carnivora (食肉目)
Family	Phocidae (True Seals)	Ursidae (Bears)
Genus	Phoca (Harbor Seals)	Ursus (Bears)
Species	Phoca vitulina	Ursus maritimus

Evolutionary Relationship

Common Seal and Polar bear share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Seal	Polar bear
Diet	Carnivore	Carnivore
Average Lifespan	30 years	25 years
Average Length	1.7 m	2.4 m
Average Weight	80.0 kg	450.0 kg

Habitat & Geographic Range

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Seal

分布最广的鳍足类动物港海豹（Phoca vitulina）栖居于北大西洋和北太平洋温带及亚北极沿海水域。成体体重可达130千克，在海中捕食鱼类、鱿鱼和甲壳动物，并在沙滩或礁岩上休息，两者时间大致相当。大而富有表情的眼睛适应于弱光下的水下视觉。港海豹是虎鲸、鲨鱼和北极熊的重要食物来源。

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway