Australian thornback skate vs Polar bear

Dentiraja lemprieri compared with Ursus maritimus

Key Differences

Australian thornback skate is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Australian thornback skate	Polar bear
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Rajiformes (Rajiformes)	Carnivora (Carnivorans)
Family	Rajidae	Ursidae (Bears)
Genus	Dentiraja	Ursus (Bears)
Species	Dentiraja lemprieri	Ursus maritimus

Evolutionary Relationship

Australian thornback skate and Polar bear share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Australian thornback skate

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Australian thornback skate	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Australian thornback skate

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.

Australian thornback skate

The Australian thornback skate (Dentiraja lemprieri) is a species in the genus Dentiraja. It is currently classified as Least Concern on the IUCN Red List. Dentiraja lemprieri contributes to the biodiversity of its native ecosystems.

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.