Gray smooth hound vs Polar bear

Mustelus californicus compared with Ursus maritimus

Key Differences

• Gray smooth hound is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Gray smooth hound	Polar bear
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class	Chondrichthyes (연골어류)	Mammalia (포유류)
Order	Carcharhiniformes (흉상어목)	Carnivora (식육목)
Family	Triakidae	Ursidae (Bears)
Genus	Mustelus	Ursus (Bears)
Species	Mustelus californicus	Ursus maritimus

Evolutionary Relationship

Gray smooth hound and Polar bear share a common ancestor at the Phylum level: Chordata. (척삭동물)

Conservation Status

Gray smooth hound

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Gray smooth hound	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Gray smooth hound

Habitat

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

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.

Polar bear

지구상에서 가장 큰 육상 육식동물인 북극곰은 700kg을 넘을 수 있으며 캐나다에서 러시아까지 북극 해빙 전역에 분포한다. 고리 물범과 수염 물범을 사냥하기 위해 해빙에 의존하는 고도로 특수화된 해양 포유류이다. 광활한 거리를 헤엄쳐 다닐 수 있는 뛰어난 수영 실력을 가지고 있다. 취약종으로 등재되어 있으며, 기후 변화로 인한 급격한 북극 해빙 감소로 심각한 압력을 받고 있다.