Polar bear vs Rusty Catshark

Ursus maritimus compared with Halaelurus sellus

Key Differences

• Polar bear is Vulnerable while Rusty Catshark is Least Concern.

Taxonomic Classification

Rank	Polar bear	Rusty Catshark
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Chondrichthyes (ปลากระดูกอ่อน)
Order	Carnivora (สัตว์กินเนื้อ)	Carcharhiniformes (อันดับปลาฉลามครีบดำ)
Family	Ursidae (Bears)	Scyliorhinidae
Genus	Ursus (Bears)	Halaelurus
Species	Ursus maritimus	Halaelurus sellus

Evolutionary Relationship

Polar bear and Rusty Catshark share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Rusty Catshark

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Rusty Catshark
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.

Rusty Catshark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

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.