Common Seal vs String Sargassum

Phoca vitulina compared with Sargassum setifolium

Key Differences

• Common Seal is Near Threatened while String Sargassum is Endangered.

Taxonomic Classification

Rank	Common Seal	String Sargassum
Kingdom	Animalia (動物)	Chromista (クロミスタ)
Phylum	Chordata (脊索動物)	Ochrophyta (オクロ植物)
Class	Mammalia (哺乳類)	Phaeophyceae (褐藻)
Order	Pinnipedia (Seals & Sea Lions)	Fucales (Fucales)
Family	Phocidae (True Seals)	Sargassaceae
Genus	Phoca (Harbor Seals)	Sargassum
Species	Phoca vitulina	Sargassum setifolium

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

String Sargassum

EN — Endangered

Physical Characteristics

Attribute	Common Seal	String Sargassum
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.

String Sargassum

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。