arrow worm vs Blauwal

Parasagitta elegans compared with Balaenoptera musculus

Key Differences

• arrow worm is Not Evaluated while Blauwal is Vulnerable.

Taxonomic Classification

Rank	arrow worm	Blauwal
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Chaetognatha (Pfeilwürmer)	Chordata (Chordatiere)
Class	Sagittoidea (Sagittoidea)	Mammalia (Säugetiere)
Order	Aphragmophora (Aphragmophora)	Cetacea (Whales & Dolphins)
Family	Sagittidae	Balaenopteridae (Rorquals)
Genus	Parasagitta	Balaenoptera (Rorquals)
Species	Parasagitta elegans	Balaenoptera musculus

Evolutionary Relationship

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

Conservation Status

arrow worm

NE — Not Evaluated

Blauwal

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	arrow worm	Blauwal
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

arrow worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark and Norway.

Blauwal

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). 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.

Blauwal

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇳🇴 Norway