arrow worm vs Brook Floater

Parasagitta elegans compared with Alasmidonta varicosa

Key Differences

• arrow worm is Not Evaluated while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	arrow worm	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chaetognatha (arrow worms)	Mollusca (Mollusks)
Class	Sagittoidea (Sagittoidea)	Bivalvia (Bivalvia)
Order	Aphragmophora (Aphragmophora)	Unionida (Unionida)
Family	Sagittidae	Unionidae
Genus	Parasagitta	Alasmidonta
Species	Parasagitta elegans	Alasmidonta varicosa

Evolutionary Relationship

arrow worm and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

arrow worm

NE — Not Evaluated

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	arrow worm	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arrow worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark and Norway.

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.

arrow worm

The Arrow worm, Parasagitta elegans, is a species. Native to Europe, inhabiting ecosystems characteristic of the region.

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.