Broken Ridge Skate vs Polar bear

Notoraja lira compared with Ursus maritimus

Key Differences

Broken Ridge Skate is Data Deficient while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Broken Ridge 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	Arhynchobatidae	Ursidae (Bears)
Genus	Notoraja	Ursus (Bears)
Species	Notoraja lira	Ursus maritimus

Evolutionary Relationship

Broken Ridge Skate and Polar bear share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Broken Ridge Skate

DD — Data Deficient

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Broken Ridge Skate	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Broken Ridge 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.

Broken Ridge Skate

The Broken Ridge Skate (Notoraja lira) is a species in the genus Notoraja. It is currently classified as Data Deficient on the IUCN Red List. This species is recognized for its ecological significance within its native 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.