common Atlantic octopus vs common bottlenose dolphin

Octopus vulgaris compared with Tursiops truncatus

Key Differences

• common Atlantic octopus is Not Evaluated while common bottlenose dolphin is Least Concern.
• common bottlenose dolphin is 60.0x heavier than common Atlantic octopus.
• common bottlenose dolphin lives longer (45 years vs 2 years).

Taxonomic Classification

Rank	common Atlantic octopus	common bottlenose dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Cephalopoda (Cephalopods)	Mammalia (Mammals)
Order	Octopoda (Octopuses)	Cetacea (Whales & Dolphins)
Family	Octopodidae (Common Octopuses)	Delphinidae (Oceanic Dolphins)
Genus	Octopus (Octopuses)	Tursiops (Bottlenose Dolphins)
Species	Octopus vulgaris	Tursiops truncatus

Evolutionary Relationship

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

Conservation Status

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

Attribute	common Atlantic octopus	common bottlenose dolphin
Diet	Carnivore	Carnivore
Average Lifespan	2 years	45 years
Average Length	60 cm	3.0 m
Average Weight	5.0 kg	300.0 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.

common bottlenose dolphin

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

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.

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.

Shared Countries

Both species can be found in 4 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden