Bigeye thresher vs Feathered slender

Alopias pelagicus compared with Caloptilia cuculipennella

Key Differences

• Bigeye thresher is Endangered while Feathered slender is Near Threatened.

Taxonomic Classification

Rank	Bigeye thresher	Feathered slender
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Chondrichthyes (Cartilaginous Fish)	Insecta (Insects)
Order	Lamniformes (Mackerel Sharks)	Lepidoptera (Butterflies & Moths)
Family	Alopiidae	Gracillariidae
Genus	Alopias	Caloptilia
Species	Alopias pelagicus	Caloptilia cuculipennella

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Feathered slender

NT — Near Threatened

Physical Characteristics

Attribute	Bigeye thresher	Feathered slender
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.

Feathered slender

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Asia (Japan), Europe (7 countries), and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.