Bigeye thresher vs Dusky arion

Alopias pelagicus compared with Arion subfuscus

Key Differences

• Bigeye thresher is Endangered while Dusky arion is Data Deficient.

Taxonomic Classification

Rank	Bigeye thresher	Dusky arion
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Chondrichthyes (Cartilaginous Fish)	Gastropoda (Gastropoda)
Order	Lamniformes (Mackerel Sharks)	Stylommatophora (Stylommatophora)
Family	Alopiidae	Arionidae
Genus	Alopias	Arion
Species	Alopias pelagicus	Arion subfuscus

Evolutionary Relationship

Bigeye thresher and Dusky arion share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bigeye thresher

EN — Endangered

Dusky arion

DD — Data Deficient

Physical Characteristics

Attribute	Bigeye thresher	Dusky arion
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bigeye thresher

Habitat

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

Range

Distributed across Colombia and Taiwan. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Dusky arion

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found across Europe (5 countries) and North America (United States).

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.