Bigeye thresher vs Lesser Cachalot

Alopias pelagicus compared with Kogia breviceps

Key Differences

• Bigeye thresher is Endangered while Lesser Cachalot is Data Deficient.

Taxonomic Classification

Rank	Bigeye thresher	Lesser Cachalot
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Lamniformes (Mackerel Sharks)	Cetacea (Whales & Dolphins)
Family	Alopiidae	Kogiidae
Genus	Alopias	Kogia
Species	Alopias pelagicus	Kogia breviceps

Evolutionary Relationship

Bigeye thresher and Lesser Cachalot share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Lesser Cachalot

DD — Data Deficient

Physical Characteristics

Attribute	Bigeye thresher	Lesser Cachalot
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.

Lesser Cachalot

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, Portugal, Sweden, and Taiwan.

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.

Shared Countries

Both species can be found in 2 countries:

🇨🇴 Colombia 🇹🇼 Taiwan