Common Seal vs Hirata-ei

Phoca vitulina compared with Urolophus aurantiacus

Key Differences

Common Seal is Near Threatened while Hirata-ei is Vulnerable.

Taxonomic Classification

Rank	Common Seal	Hirata-ei
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Elasmobranchii
Order	Pinnipedia (Seals & Sea Lions)	Myliobatiformes (トビエイ目)
Family	Phocidae (True Seals)	Urolophidae
Genus	Phoca (Harbor Seals)	Urolophus
Species	Phoca vitulina	Urolophus aurantiacus

Evolutionary Relationship

Common Seal and Hirata-ei share a common ancestor at the Phylum level: Chordata. (脊索動物)

表示 Phylum: Chordata

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Hirata-ei

VU — Vulnerable

Physical Characteristics

Attribute	Common Seal	Hirata-ei
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.

Hirata-ei

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

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

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。