Big eye chimaera vs Bigeye thresher

Hydrolagus macrophthalmus compared with Alopias pelagicus

Key Differences

• Big eye chimaera is Least Concern while Bigeye thresher is Endangered.

Taxonomic Classification

Rank	Big eye chimaera	Bigeye thresher
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Holocephali (Holocephali)	Chondrichthyes (Cartilaginous Fish)
Order	Chimaeriformes (Chimaeriformes)	Lamniformes (Mackerel Sharks)
Family	Chimaeridae	Alopiidae
Genus	Hydrolagus	Alopias
Species	Hydrolagus macrophthalmus	Alopias pelagicus

Evolutionary Relationship

Big eye chimaera and Bigeye thresher share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big eye chimaera

LC — Least Concern

Bigeye thresher

EN — Endangered

Physical Characteristics

Attribute	Big eye chimaera	Bigeye thresher
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big eye chimaera

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Chile.

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.

Big eye chimaera

The Big eye chimaera (Hydrolagus macrophthalmus) is a species in the genus Hydrolagus. It is currently classified as Least Concern on the IUCN Red List. Native to South America, inhabiting ecosystems characteristic of the region.

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.