Humpback Western dogfish vs Oso Polar

Squalus quasimodo compared with Ursus maritimus

Key Differences

• Humpback Western dogfish is Data Deficient while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Humpback Western dogfish	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Elasmobranchii	Mammalia (mamíferos)
Order	Squaliformes (Squaliformes)	Carnivora (carnívoros)
Family	Squalidae	Ursidae (Bears)
Genus	Squalus	Ursus (Bears)
Species	Squalus quasimodo	Ursus maritimus

Evolutionary Relationship

Humpback Western dogfish and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Humpback Western dogfish

DD — Data Deficient

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Humpback Western dogfish	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Humpback Western dogfish

Oso Polar

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.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.