Brown cat shark vs Polar bear

Apristurus brunneus compared with Ursus maritimus

Key Differences

• Brown cat shark is Data Deficient while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Brown cat shark	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Chondrichthyes (軟骨魚綱)	Mammalia (哺乳類)
Order	Carcharhiniformes (メジロザメ目)	Carnivora (ネコ目)
Family	Scyliorhinidae	Ursidae (Bears)
Genus	Apristurus	Ursus (Bears)
Species	Apristurus brunneus	Ursus maritimus

Evolutionary Relationship

Brown cat shark and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Brown cat shark

DD — Data Deficient

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brown cat shark	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Brown cat shark

Habitat

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

Range

Found in Chile.

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 cat shark

The Brown Cat Shark (Apristurus brunneus) is a species in the genus Apristurus. It is currently classified as Data Deficient on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。