Big eye thresher shark vs St. James' shell

Alopias superciliosus compared with Pecten maximus

Key Differences

Big eye thresher shark is Vulnerable while St. James' shell is Least Concern.

Taxonomic Classification

Rank	Big eye thresher shark	St. James' shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Chondrichthyes (Cartilaginous Fish)	Bivalvia (Bivalvia)
Order	Lamniformes (Mackerel Sharks)	Pectinida (Pectinida)
Family	Alopiidae	Pectinidae
Genus	Alopias	Pecten
Species	Alopias superciliosus	Pecten maximus

Evolutionary Relationship

Big eye thresher shark and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Big eye thresher shark

VU — Vulnerable

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Big eye thresher shark	St. James' shell
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.

St. James' shell

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (China), Europe (8 countries), and South America (Chile).

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.

St. James' shell

St. James' shell (Pecten maximus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.