Brook Floater vs green hydra

Alasmidonta varicosa compared with Hydra viridissima

Key Differences

• Brook Floater is Vulnerable while green hydra is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	green hydra
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Mollusca (軟体動物)	Cnidaria (刺胞動物)
Class	Bivalvia (二枚貝)	Hydrozoa (ヒドロ虫綱)
Order	Unionida (イシガイ目)	Anthoathecata (花クラゲ目)
Family	Unionidae	Hydridae
Genus	Alasmidonta	Hydra
Species	Alasmidonta varicosa	Hydra viridissima

Evolutionary Relationship

Brook Floater and green hydra share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Brook Floater

VU — Vulnerable

green hydra

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	green hydra
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Floater

Habitat

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

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

green hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.