arch-fronted swimming crab vs Polar bear

Liocarcinus navigator compared with Ursus maritimus

Key Differences

• arch-fronted swimming crab is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	arch-fronted swimming crab	Polar bear
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Malacostraca (Crustaceans)	Mammalia (Mammals)
Order	Decapoda (Decapoda)	Carnivora (Carnivorans)
Family	Polybiidae	Ursidae (Bears)
Genus	Liocarcinus	Ursus (Bears)
Species	Liocarcinus navigator	Ursus maritimus

Evolutionary Relationship

arch-fronted swimming crab and Polar bear share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

arch-fronted swimming crab

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	arch-fronted swimming crab	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

arch-fronted swimming crab

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Distributed across Belgium, Brazil, Denmark, Norway, and Sweden.

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.

arch-fronted swimming crab

The Arch-fronted swimming crab (Liocarcinus navigator) is a species in the genus Liocarcinus. It is currently classified as Least Concern on the IUCN Red List. Typically found in marine, freshwater, and terrestrial environments.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway