藍鯨 vs common hydra

Balaenoptera musculus compared with Hydra vulgaris

Key Differences

• 藍鯨 is Vulnerable while common hydra is Not Evaluated.

Taxonomic Classification

Rank	藍鯨	common hydra
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	Cetacea (Whales & Dolphins)	Anthoathecata (花水母目)
Family	Balaenopteridae (Rorquals)	Hydridae
Genus	Balaenoptera (Rorquals)	Hydra
Species	Balaenoptera musculus	Hydra vulgaris

Evolutionary Relationship

藍鯨 and common hydra share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

藍鯨

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

common hydra

NE — Not Evaluated

Physical Characteristics

Attribute	藍鯨	common hydra
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

藍鯨

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

藍鯨

蓝鲸是地球上已知存在过的最大动物，体长可达33米，体重达200吨，其心脏单独就重达一辆小型轿车的重量。分布于各大洋，在极地觅食地和热带繁殖地之间进行迁徙。它们是滤食性动物，每日可消耗多达4吨磷虾。蓝鲸被列为濒危物种，20世纪捕鲸活动使其濒临灭绝，目前全球种群估计约为1万至2.5万头。

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden