common hydra vs green hydra

Hydra vulgaris compared with Hydra viridissima

Taxonomic Classification

Rank	common hydra	green hydra
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Cnidaria (cnidários)	Cnidaria (cnidários)
Class same	Hydrozoa (Hydrozoa)	Hydrozoa (Hydrozoa)
Order same	Anthoathecata (Anthoathecata)	Anthoathecata (Anthoathecata)
Family same	Hydridae	Hydridae
Genus same	Hydra	Hydra
Species	Hydra vulgaris	Hydra viridissima

Evolutionary Relationship

common hydra and green hydra share a common ancestor at the Genus level: Hydra.

Conservation Status

common hydra

NE — Not Evaluated

green hydra

NE — Not Evaluated

Physical Characteristics

Attribute	common hydra	green hydra
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

green hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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