Bigeye thresher vs Smooth-backed Frog

Alopias pelagicus compared with Lithobates psilonota

Key Differences

• Bigeye thresher is Endangered while Smooth-backed Frog is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Smooth-backed Frog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Amphibia (Amphibians)
Order	Lamniformes (Mackerel Sharks)	Anura (Frogs & Toads)
Family	Alopiidae	Ranidae
Genus	Alopias	Lithobates
Species	Alopias pelagicus	Lithobates psilonota

Evolutionary Relationship

Bigeye thresher and Smooth-backed Frog share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Smooth-backed Frog

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Smooth-backed Frog
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.

Smooth-backed Frog

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Mexico.

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.