Polar bear vs Swamp Orb Mussel

Ursus maritimus compared with Sphaerium nucleus

Key Differences

Polar bear is Vulnerable while Swamp Orb Mussel is Least Concern.

Taxonomic Classification

Rank	Polar bear	Swamp Orb Mussel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Carnivora (Carnivorans)	Sphaeriida (Sphaeriida)
Family	Ursidae (Bears)	Sphaeriidae
Genus	Ursus (Bears)	Sphaerium
Species	Ursus maritimus	Sphaerium nucleus

Evolutionary Relationship

Polar bear and Swamp Orb Mussel share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Swamp Orb Mussel

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Swamp Orb Mussel
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.

Swamp Orb Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Sweden, and Ukraine.

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.