Big eye thresher shark vs Black-Lined Periwinkle

Alopias superciliosus compared with Littorina saxatilis

Key Differences

• Big eye thresher shark is Vulnerable while Black-Lined Periwinkle is Least Concern.

Taxonomic Classification

Rank	Big eye thresher shark	Black-Lined Periwinkle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Chondrichthyes (Cartilaginous Fish)	Gastropoda (Gastropoda)
Order	Lamniformes (Mackerel Sharks)	Littorinimorpha (Littorinimorpha)
Family	Alopiidae	Littorinidae
Genus	Alopias	Littorina
Species	Alopias superciliosus	Littorina saxatilis

Evolutionary Relationship

Big eye thresher shark and Black-Lined Periwinkle share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Big eye thresher shark

VU — Vulnerable

Black-Lined Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Big eye thresher shark	Black-Lined Periwinkle
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.

Black-Lined Periwinkle

Habitat

Found across multiple habitat types including tropical and subtropical grasslands and savannas, flooded grasslands and savannas, and deserts and xeric shrublands within the Afrotropic biogeographic realm.

Range

Widely distributed across Africa (Namibia, South Africa), Europe (5 countries), and North America (United States).

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.

Black-Lined Periwinkle

The Black-Lined Periwinkle (Littorina saxatilis) is a species in the genus Littorina. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including tropical and subtropical grasslands and savannas, flooded grasslands and savannas, and deserts and xeric shrublands within the Afrotropic biogeographic realm.

Shared Countries

Both species can be found in 1 countries:

🇵🇹 Portugal