Common Seal vs Flat Periwinkle

Phoca vitulina compared with Littorina obtusata

Key Differences

Common Seal is Near Threatened while Flat Periwinkle is Least Concern.

Taxonomic Classification

Rank	Common Seal	Flat Periwinkle
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Mammalia (哺乳類)	Gastropoda (腹足綱)
Order	Pinnipedia (Seals & Sea Lions)	Littorinimorpha (タマキビガイ下目)
Family	Phocidae (True Seals)	Littorinidae
Genus	Phoca (Harbor Seals)	Littorina
Species	Phoca vitulina	Littorina obtusata

Evolutionary Relationship

Common Seal and Flat Periwinkle share a common ancestor at the Kingdom level: Animalia. (動物)

表示 Kingdom: Animalia

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Flat Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Common Seal	Flat Periwinkle
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.

Flat Periwinkle

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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。