Polar bear vs rod-shaped marine isopod

Ursus maritimus compared with Idotea linearis

Key Differences

Polar bear is Vulnerable while rod-shaped marine isopod is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	rod-shaped marine isopod
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Arthropoda (สัตว์ขาปล้อง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Malacostraca (Crustaceans)
Order	Carnivora (สัตว์กินเนื้อ)	Isopoda (ไอโซพอด)
Family	Ursidae (Bears)	Idoteidae
Genus	Ursus (Bears)	Idotea
Species	Ursus maritimus	Idotea linearis

Evolutionary Relationship

Polar bear and rod-shaped marine isopod share a common ancestor at the Kingdom level: Animalia. (สัตว์)

ดู: Kingdom: Animalia

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

rod-shaped marine isopod

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	rod-shaped marine isopod
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

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.

rod-shaped marine isopod

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.