Big eye thresher shark vs Common hammerhead

Alopias superciliosus compared with Sphyrna zygaena

Key Differences

• Big eye thresher shark is Vulnerable while Common hammerhead is Not Evaluated.

Taxonomic Classification

Rank	Big eye thresher shark	Common hammerhead
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Chondrichthyes (Cartilaginous Fish)	Chondrichthyes (Cartilaginous Fish)
Order	Lamniformes (Mackerel Sharks)	Carcharhiniformes (Ground Sharks)
Family	Alopiidae	Sphyrnidae (Hammerhead Sharks)
Genus	Alopias	Sphyrna (Hammerhead Sharks)
Species	Alopias superciliosus	Sphyrna zygaena

Evolutionary Relationship

Big eye thresher shark and Common hammerhead share a common ancestor at the Class level: Chondrichthyes. (Cartilaginous Fish)

Conservation Status

Big eye thresher shark

VU — Vulnerable

Common hammerhead

NE — Not Evaluated

Physical Characteristics

Attribute	Big eye thresher shark	Common hammerhead
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

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 hammerhead

Habitat

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

Range

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

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 hammerhead

The common hammerhead, <em>Sphyrna zygaena</em>, is a cartilaginous fish belonging to the order Carcharhiniformes, family Sphyrnidae. This species is typically found in marine environments and has a distribution that includes the waters of Chile, Denmark, Portugal, Sweden, and Taiwan, reflecting a wide range across both Atlantic and Pacific Ocean systems. As a hammerhead shark, <em>Sphyrna zygaena</em> possesses the characteristic cephalofoil, the laterally expanded head structure that provides enhanced sensory capabilities and hydrodynamic benefits. Hammerhead sharks are generally known to be active, wide-ranging predators within marine ecosystems. No dietary information has been provided for this specific species in current records. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇨🇱 Chile 🇵🇹 Portugal 🇹🇼 Taiwan