black ribbon worm vs Polar bear

Cerebratulus marginatus compared with Ursus maritimus

Key Differences

• black ribbon worm is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	black ribbon worm	Polar bear
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum	Nemertea (Nemertea)	Chordata (động vật có dây sống)
Class	Pilidiophora (Pilidiophora)	Mammalia (lớp Thú)
Order	Heteronemertea (Heteronemertea)	Carnivora (bộ Ăn thịt)
Family	Lineidae	Ursidae (Bears)
Genus	Cerebratulus	Ursus (Bears)
Species	Cerebratulus marginatus	Ursus maritimus

Evolutionary Relationship

black ribbon worm and Polar bear share a common ancestor at the Kingdom level: Animalia. (động vật)

Conservation Status

black ribbon worm

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	black ribbon worm	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

black ribbon worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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.

black ribbon worm

The Black ribbon worm (Cerebratulus marginatus) is a species in the genus Cerebratulus. Native to Europe, inhabiting ecosystems characteristic of the region.

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