four-tooth tubeworm vs ours blanc

Spirobranchus tetraceros compared with Ursus maritimus

Key Differences

• four-tooth tubeworm is Not Evaluated while ours blanc is Vulnerable.

Taxonomic Classification

Rank	four-tooth tubeworm	ours blanc
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Polychaeta (Polychaeta)	Mammalia (mammifères)
Order	Sabellida (Sabellida)	Carnivora (carnivores)
Family	Serpulidae	Ursidae (Bears)
Genus	Spirobranchus	Ursus (Bears)
Species	Spirobranchus tetraceros	Ursus maritimus

Evolutionary Relationship

four-tooth tubeworm and ours blanc share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

four-tooth tubeworm

NE — Not Evaluated

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	four-tooth tubeworm	ours blanc
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

four-tooth tubeworm

Habitat

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

Range

Distributed across Cyprus, Greece, Lebanon, Syria, and Turkey.

ours blanc

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.

ours blanc

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.