Polar bear vs Tube-building worm

Ursus maritimus compared with Hydroides dirampha

Key Differences

• Polar bear is Vulnerable while Tube-building worm is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	Tube-building worm
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Annelida (Segmented Worms)
Class	Mammalia (Mammals)	Polychaeta (Polychaeta)
Order	Carnivora (Carnivorans)	Sabellida (Sabellida)
Family	Ursidae (Bears)	Serpulidae
Genus	Ursus (Bears)	Hydroides
Species	Ursus maritimus	Hydroides dirampha

Evolutionary Relationship

Polar bear and Tube-building worm share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Tube-building worm

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	Tube-building worm
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Tube-building worm

Habitat

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

Range

Widely distributed across Africa (Algeria, Egypt, Tunisia), Asia (Lebanon, Taiwan, Turkey), Europe (4 countries), North America (United States), and Oceania and the Pacific (Australia).

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway