Arctic lemming vs common Atlantic octopus

Dicrostonyx torquatus compared with Octopus vulgaris

Key Differences

• Arctic lemming is Least Concern while common Atlantic octopus is Not Evaluated.

Taxonomic Classification

Rank	Arctic lemming	common Atlantic octopus
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Cephalopoda (Cephalopods)
Order	Rodentia (Rodents)	Octopoda (Octopuses)
Family	Cricetidae	Octopodidae (Common Octopuses)
Genus	Dicrostonyx	Octopus (Octopuses)
Species	Dicrostonyx torquatus	Octopus vulgaris

Evolutionary Relationship

Arctic lemming and common Atlantic octopus share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Arctic lemming

LC — Least Concern

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Physical Characteristics

Attribute	Arctic lemming	common Atlantic octopus
Diet	—	Carnivore
Average Lifespan	—	2 years
Average Length	—	60 cm
Average Weight	—	5.0 kg

Habitat & Geographic Range

Arctic lemming

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

common Atlantic octopus

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Distributed across Chile, Denmark, Norway, Portugal, and Sweden.

Arctic lemming

The Arctic lemming (Dicrostonyx torquatus) is a species in the genus Dicrostonyx. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

common Atlantic octopus

One of the most studied invertebrates in neuroscience and behavioral biology, common octopuses inhabit rocky reefs and seafloors in tropical and temperate coastal waters globally. Highly intelligent with distributed nervous systems — two-thirds of their 500 million neurons reside in their arms — they demonstrate tool use, problem-solving, and individual personalities. Masters of camouflage, they change skin color and texture in milliseconds. They have three hearts, blue copper-based blood, and extremely short lifespans of 1–2 years.