Common Seal vs

Phoca vitulina compared with Gomphonema sphenovertex

Key Differences

Common Seal is Near Threatened while is Not Evaluated.

Taxonomic Classification

Rank	Common Seal
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)	Bacillariophyceae (クサリケイソウ綱)
Order	Pinnipedia (Seals & Sea Lions)	Cymbellales (Cymbellales)
Family	Phocidae (True Seals)	Gomphonemataceae
Genus	Phoca (Harbor Seals)	Gomphonema
Species	Phoca vitulina	Gomphonema sphenovertex

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

NE — Not Evaluated

Physical Characteristics

Attribute	Common Seal
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.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across 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。

Gomphonema sphenovertexは、Gomphonemataceae科に属する淡水珪藻で、膨らんだ頂端部を持つ楔形の殻で区別される。河川や川の底生および着生群集に見られる。