beaded chestnut vs common Atlantic octopus

Agrochola lychnidis compared with Octopus vulgaris

Key Differences

• beaded chestnut is Near Threatened while common Atlantic octopus is Not Evaluated.

Taxonomic Classification

Rank	beaded chestnut	common Atlantic octopus
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Cephalopoda (Cephalopods)
Order	Lepidoptera (Butterflies & Moths)	Octopoda (Octopuses)
Family	Noctuidae	Octopodidae (Common Octopuses)
Genus	Agrochola	Octopus (Octopuses)
Species	Agrochola lychnidis	Octopus vulgaris

Evolutionary Relationship

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

Conservation Status

beaded chestnut

NT — Near Threatened

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

beaded chestnut

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

common Atlantic octopus

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

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

beaded chestnut

The Beaded chestnut (Agrochola lychnidis) is a species in the genus Agrochola. It is currently classified as Near Threatened on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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