Polar bear vs red ribbon worm

Ursus maritimus compared with Lineus ruber

Key Differences

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

Taxonomic Classification

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

Evolutionary Relationship

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

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

red ribbon worm

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	red ribbon 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.

red ribbon worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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