common hydra vs 虎鯨

Hydra vulgaris compared with Orcinus orca

Key Differences

• common hydra is Not Evaluated while 虎鯨 is Data Deficient.

Taxonomic Classification

Rank	common hydra	虎鯨
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Cnidaria (刺胞動物門)	Chordata (脊索动物门)
Class	Hydrozoa (水螅纲)	Mammalia (哺乳動物)
Order	Anthoathecata (花水母目)	Cetacea (Whales & Dolphins)
Family	Hydridae	Delphinidae (Oceanic Dolphins)
Genus	Hydra	Orcinus (Orcas)
Species	Hydra vulgaris	Orcinus orca

Evolutionary Relationship

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

Conservation Status

common hydra

NE — Not Evaluated

虎鯨

DD — Data Deficient

Population: ~50.0K

Trend: Unknown ?

Physical Characteristics

Attribute	common hydra	虎鯨
Diet	—	Carnivore
Average Lifespan	—	50 years
Average Length	—	8.0 m
Average Weight	—	5.4 t

Habitat & Geographic Range

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

虎鯨

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, Venezuela).

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.

虎鯨

作为海豚科体型最大的成员，虎鲸（Orcinus orca）体长可达9米，体重6吨，分布于从北极到南极的所有海洋。以母系群体生活的顶级捕食者，不同种群具有独特的方言、狩猎策略和文化传统。一些种群专门捕食鱼类，另一些则捕食海洋哺乳动物。没有天敌，虎鲸位于其所栖居的每条海洋食物链的顶端。

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden