Dog shark vs Polar bear

Scoliodon laticaudus compared with Ursus maritimus

Key Differences

• Dog shark is Near Threatened while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Dog shark	Polar bear
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Chondrichthyes (Lớp Cá sụn)	Mammalia (lớp Thú)
Order	Carcharhiniformes (Bộ Cá mập mắt trắng)	Carnivora (bộ Ăn thịt)
Family	Carcharhinidae	Ursidae (Bears)
Genus	Scoliodon	Ursus (Bears)
Species	Scoliodon laticaudus	Ursus maritimus

Evolutionary Relationship

Dog shark and Polar bear share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

Dog shark

NT — Near Threatened

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Dog shark

Habitat

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

Range

Found in Taiwan. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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

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.