Common Seal vs Narrow-headed Slender Opossum

Phoca vitulina compared with Marmosops cracens

Key Differences

• Common Seal is Near Threatened while Narrow-headed Slender Opossum is Data Deficient.

Taxonomic Classification

Rank	Common Seal	Narrow-headed Slender Opossum
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Pinnipedia (Seals & Sea Lions)	Didelphimorphia (Didelphimorphia)
Family	Phocidae (True Seals)	Didelphidae
Genus	Phoca (Harbor Seals)	Marmosops
Species	Phoca vitulina	Marmosops cracens

Evolutionary Relationship

Common Seal and Narrow-headed Slender Opossum share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Narrow-headed Slender Opossum

DD — Data Deficient

Physical Characteristics

Attribute	Common Seal	Narrow-headed Slender Opossum
Diet	Carnivore	—
Average Lifespan	30 years	—
Average Length	1.7 m	—
Average Weight	80.0 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.

Narrow-headed Slender Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Venezuela.

Common Seal

最も広く分布する鰭脚類であるゴマフアザラシの近縁種・ゼニガタアザラシ（Phoca vitulina）は、北大西洋と北太平洋の温帯・亜北極沿岸に生息する。成体は最大130kgに達し、海での魚・イカ・甲殻類の捕食と海岸や岩場での休息にほぼ同じ時間を費やす。大きく表情豊かな目は低照度での水中視覚に適応している。シャチ・サメ・ホッキョクグマにとって重要な食料源である。