brown ribbon worm vs Polar bear

Cerebratulus fuscus compared with Ursus maritimus

Key Differences

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

Taxonomic Classification

Rank	brown ribbon worm	Polar bear
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Nemertea (นีเมอร์เทีย)	Chordata (สัตว์มีแกนสันหลัง)
Class	Pilidiophora (Pilidiophora)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Heteronemertea (Heteronemertea)	Carnivora (สัตว์กินเนื้อ)
Family	Lineidae	Ursidae (Bears)
Genus	Cerebratulus	Ursus (Bears)
Species	Cerebratulus fuscus	Ursus maritimus

Evolutionary Relationship

brown ribbon worm and Polar bear share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

brown ribbon worm

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

brown ribbon worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across 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.

brown ribbon worm

The Brown Ribbon Worm (Cerebratulus fuscus) is a species in the genus Cerebratulus. Native to Europe, inhabiting ecosystems characteristic of the region. Distributed across Norway and Sweden. As a member of the Cerebratulus genus, this species contributes to biodiversity in its native range.

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