brown hydra vs common hydra

Hydra oligactis compared with Hydra vulgaris

Taxonomic Classification

Rank	brown hydra	common hydra
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Cnidaria (Cnidarians)	Cnidaria (Cnidarians)
Class same	Hydrozoa (Hydrozoa)	Hydrozoa (Hydrozoa)
Order same	Anthoathecata (Anthoathecata)	Anthoathecata (Anthoathecata)
Family same	Hydridae	Hydridae
Genus same	Hydra	Hydra
Species	Hydra oligactis	Hydra vulgaris

Evolutionary Relationship

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

Conservation Status

brown hydra

NE — Not Evaluated

common hydra

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

brown hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

brown hydra

The Brown Hydra (Hydra oligactis) is a species in the genus Hydra. Native to Europe, inhabiting ecosystems characteristic of the region. Distributed across Denmark, Norway, and Sweden. As a member of the Hydra genus, this species contributes to biodiversity in its native range.

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