blunt tellin vs common Atlantic octopus

Arcopagia crassa compared with Octopus vulgaris

Key Differences

• blunt tellin is Vulnerable while common Atlantic octopus is Not Evaluated.

Taxonomic Classification

Rank	blunt tellin	common Atlantic octopus
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Bivalvia (Bivalvia)	Cephalopoda (Cephalopods)
Order	Cardiida (Cardiida)	Octopoda (Octopuses)
Family	Tellinidae	Octopodidae (Common Octopuses)
Genus	Arcopagia	Octopus (Octopuses)
Species	Arcopagia crassa	Octopus vulgaris

Evolutionary Relationship

blunt tellin and common Atlantic octopus share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

blunt tellin

VU — Vulnerable

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

blunt tellin

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

common Atlantic octopus

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

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

blunt tellin

The Blunt tellin (Arcopagia crassa) is a species in the genus Arcopagia. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden