common Atlantic octopus vs Giant Otter

Octopus vulgaris compared with Pteronura brasiliensis

Key Differences

• common Atlantic octopus is Not Evaluated while Giant Otter is Endangered.

Taxonomic Classification

Rank	common Atlantic octopus	Giant Otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Cephalopoda (Cephalopods)	Mammalia (Mammals)
Order	Octopoda (Octopuses)	Carnivora (Carnivorans)
Family	Octopodidae (Common Octopuses)	Mustelidae (Weasels & Otters)
Genus	Octopus (Octopuses)	Pteronura
Species	Octopus vulgaris	Pteronura brasiliensis

Evolutionary Relationship

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

Conservation Status

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Giant Otter

EN — Endangered

Physical Characteristics

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

Habitat & Geographic Range

common Atlantic octopus

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

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

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.