arrow worm vs brittlestar

Parasagitta elegans compared with Amphiura filiformis

Key Differences

• arrow worm is Not Evaluated while brittlestar is Least Concern.

Taxonomic Classification

Rank	arrow worm	brittlestar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chaetognatha (arrow worms)	Echinodermata (Echinoderms)
Class	Sagittoidea (Sagittoidea)	Ophiuroidea (Ophiuroidea)
Order	Aphragmophora (Aphragmophora)	Amphilepidida (Amphilepidida)
Family	Sagittidae	Amphiuridae
Genus	Parasagitta	Amphiura
Species	Parasagitta elegans	Amphiura filiformis

Evolutionary Relationship

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

Conservation Status

arrow worm

NE — Not Evaluated

brittlestar

LC — Least Concern

Physical Characteristics

Attribute	arrow worm	brittlestar
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.

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

arrow worm

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

brittlestar

The Brittlestar (Amphiura filiformis) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇳🇴 Norway