Blacktail spurdog vs Eisbär

Squalus melanurus compared with Ursus maritimus

Key Differences

• Blacktail spurdog is Data Deficient while Eisbär is Vulnerable.

Taxonomic Classification

Rank	Blacktail spurdog	Eisbär
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Elasmobranchii	Mammalia (Säugetiere)
Order	Squaliformes (Dornhaiartige)	Carnivora (Raubtiere)
Family	Squalidae	Ursidae (Bears)
Genus	Squalus	Ursus (Bears)
Species	Squalus melanurus	Ursus maritimus

Evolutionary Relationship

Blacktail spurdog and Eisbär share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Blacktail spurdog

DD — Data Deficient

Eisbär

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Blacktail spurdog	Eisbär
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Blacktail spurdog

Eisbär

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.

Blacktail spurdog

The Blacktail spurdog (Squalus melanurus) is a species in the genus Squalus. It is currently classified as Data Deficient on the IUCN Red List.

Eisbär

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.