Brook Floater vs sea thread hydroid

Alasmidonta varicosa compared with Obelia dichotoma

Key Differences

• Brook Floater is Vulnerable while sea thread hydroid is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	sea thread hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Cnidaria (Cnidarians)
Class	Bivalvia (Bivalvia)	Hydrozoa (Hydrozoa)
Order	Unionida (Unionida)	Leptothecata (Leptothecata)
Family	Unionidae	Campanulariidae
Genus	Alasmidonta	Obelia
Species	Alasmidonta varicosa	Obelia dichotoma

Evolutionary Relationship

Brook Floater and sea thread hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

sea thread hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	sea thread hydroid
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.

sea thread hydroid

Habitat

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

Range

Widely distributed across Africa (South Africa), Europe (5 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Argentina, Chile).

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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States