Big eye thresher shark vs common Atlantic octopus

Alopias superciliosus compared with Octopus vulgaris

Key Differences

• Big eye thresher shark is Vulnerable while common Atlantic octopus is Not Evaluated.

Taxonomic Classification

Rank	Big eye thresher shark	common Atlantic octopus
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Chondrichthyes (Cartilaginous Fish)	Cephalopoda (Cephalopods)
Order	Lamniformes (Mackerel Sharks)	Octopoda (Octopuses)
Family	Alopiidae	Octopodidae (Common Octopuses)
Genus	Alopias	Octopus (Octopuses)
Species	Alopias superciliosus	Octopus vulgaris

Evolutionary Relationship

Big eye thresher shark and common Atlantic octopus share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Big eye thresher shark

VU — Vulnerable

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Physical Characteristics

Attribute	Big eye thresher shark	common Atlantic octopus
Diet	—	Carnivore
Average Lifespan	—	2 years
Average Length	—	60 cm
Average Weight	—	5.0 kg

Habitat & Geographic Range

Big eye thresher shark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Distributed across Chile, Colombia, Portugal, Taiwan, and Venezuela. 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.

Big eye thresher shark

The Big eye thresher shark (Alopias superciliosus) is a species in the genus Alopias. It is currently classified as Vulnerable on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

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 2 countries:

🇨🇱 Chile 🇵🇹 Portugal