Bigeye thresher vs Dwarf round ray

Alopias pelagicus compared with Urotrygon nana

Key Differences

• Bigeye thresher is Endangered while Dwarf round ray is Near Threatened.

Taxonomic Classification

Rank	Bigeye thresher	Dwarf round ray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Elasmobranchii
Order	Lamniformes (Mackerel Sharks)	Myliobatiformes (Myliobatiformes)
Family	Alopiidae	Urotrygonidae
Genus	Alopias	Urotrygon
Species	Alopias pelagicus	Urotrygon nana

Evolutionary Relationship

Bigeye thresher and Dwarf round ray share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Dwarf round ray

NT — Near Threatened

Physical Characteristics

Attribute	Bigeye thresher	Dwarf round ray
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.

Dwarf round ray

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.