East Asian river prawn vs Polar bear

Macrobrachium nipponense compared with Ursus maritimus

Key Differences

• East Asian river prawn is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	East Asian river prawn	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Arthropoda (節足動物)	Chordata (脊索動物)
Class	Malacostraca (軟甲綱)	Mammalia (哺乳類)
Order	Decapoda (十脚目)	Carnivora (ネコ目)
Family	Palaemonidae	Ursidae (Bears)
Genus	Macrobrachium	Ursus (Bears)
Species	Macrobrachium nipponense	Ursus maritimus

Evolutionary Relationship

East Asian river prawn and Polar bear share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

East Asian river prawn

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	East Asian river prawn	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

East Asian river prawn

Habitat

Found across multiple habitat types including temperate coniferous forests, montane grasslands and shrublands, and deserts and xeric shrublands within the Palearctic biogeographic realm.

Range

Widely distributed across Asia (5 countries), Europe (4 countries), and North America (United States).

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.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。