Circular Ear Shell vs Polar bear

Haliotis cyclobates compared with Ursus maritimus

Key Differences

• Circular Ear Shell is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Circular Ear Shell	Polar bear
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Mollusca (มอลลัสกา)	Chordata (สัตว์มีแกนสันหลัง)
Class	Gastropoda (ชั้นแกสโทรโพดา)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Lepetellida (Lepetellida)	Carnivora (สัตว์กินเนื้อ)
Family	Haliotidae	Ursidae (Bears)
Genus	Haliotis	Ursus (Bears)
Species	Haliotis cyclobates	Ursus maritimus

Evolutionary Relationship

Circular Ear Shell and Polar bear share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Circular Ear Shell

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Circular Ear Shell	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Circular Ear Shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.

Circular Ear Shell

The Circular Ear Shell (Haliotis cyclobates) is a species in the genus Haliotis. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.