Raya marrón oscuro vs Oso Polar

Sympterygia acuta compared with Ursus maritimus

Key Differences

Raya marrón oscuro is Critically Endangered while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Raya marrón oscuro	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Elasmobranchii	Mammalia (mamíferos)
Order	Rajiformes (Rajiformes)	Carnivora (carnívoros)
Family	Arhynchobatidae	Ursidae (Bears)
Genus	Sympterygia	Ursus (Bears)
Species	Sympterygia acuta	Ursus maritimus

Evolutionary Relationship

Raya marrón oscuro and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Vista Phylum: Chordata

Conservation Status

Raya marrón oscuro

CR — Critically Endangered

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Raya marrón oscuro	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Raya marrón oscuro

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.

Raya marrón oscuro

The Bignose fanskate (Sympterygia acuta) is a species in the genus Sympterygia. It is currently classified as Critically Endangered on the IUCN Red List.

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.