Big eye thresher shark vs Far Eastern Brook Lamprey

Alopias superciliosus compared with Lethenteron reissneri

Key Differences

• Big eye thresher shark is Vulnerable while Far Eastern Brook Lamprey is Least Concern.

Taxonomic Classification

Rank	Big eye thresher shark	Far Eastern Brook Lamprey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Petromyzonti (Petromyzonti)
Order	Lamniformes (Mackerel Sharks)	Petromyzontiformes (lamprey)
Family	Alopiidae	Petromyzontidae
Genus	Alopias	Lethenteron
Species	Alopias superciliosus	Lethenteron reissneri

Evolutionary Relationship

Big eye thresher shark and Far Eastern Brook Lamprey share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big eye thresher shark

VU — Vulnerable

Far Eastern Brook Lamprey

LC — Least Concern

Physical Characteristics

Attribute	Big eye thresher shark	Far Eastern Brook Lamprey
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big eye thresher shark

Habitat

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

Range

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

Far Eastern Brook Lamprey

Big eye thresher shark

The Big eye thresher shark (Alopias superciliosus) is a species in the genus Alopias. It is currently classified as Vulnerable on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.