Common Seal vs hydroid

Phoca vitulina compared with Obelia longissima

Key Differences

• Common Seal is Near Threatened while hydroid is Not Evaluated.

Taxonomic Classification

Rank	Common Seal	hydroid
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chordata (脊索动物门)	Cnidaria (刺胞動物門)
Class	Mammalia (哺乳動物)	Hydrozoa (水螅纲)
Order	Pinnipedia (Seals & Sea Lions)	Leptothecata (软水母目)
Family	Phocidae (True Seals)	Campanulariidae
Genus	Phoca (Harbor Seals)	Obelia
Species	Phoca vitulina	Obelia longissima

Evolutionary Relationship

Common Seal and hydroid share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	Common Seal	hydroid
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.

hydroid

Habitat

Native to Europe and North America and Oceania, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (Australia, New Zealand), and South America (Argentina).

Common Seal

分布最广的鳍足类动物港海豹（Phoca vitulina）栖居于北大西洋和北太平洋温带及亚北极沿海水域。成体体重可达130千克，在海中捕食鱼类、鱿鱼和甲壳动物，并在沙滩或礁岩上休息，两者时间大致相当。大而富有表情的眼睛适应于弱光下的水下视觉。港海豹是虎鲸、鲨鱼和北极熊的重要食物来源。

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States