Japanese roughshark vs Oso Polar

Oxynotus japonicus compared with Ursus maritimus

Taxonomic Classification

Rank	Japanese roughshark	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Elasmobranchii	Mammalia (mamíferos)
Order	Squaliformes (Squaliformes)	Carnivora (carnívoros)
Family	Oxynotidae	Ursidae (Bears)
Genus	Oxynotus	Ursus (Bears)
Species	Oxynotus japonicus	Ursus maritimus

Evolutionary Relationship

Japanese roughshark and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Japanese roughshark

VU — Vulnerable

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Japanese roughshark	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Japanese roughshark

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.