Bigeye thresher vs Pacific Loon

Alopias pelagicus compared with Gavia pacifica

Key Differences

• Bigeye thresher is Endangered while Pacific Loon is Not Evaluated.

Taxonomic Classification

Rank	Bigeye thresher	Pacific Loon
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Gaviiformes (Gaviiformes)
Family	Alopiidae	Gaviidae
Genus	Alopias	Gavia
Species	Alopias pelagicus	Gavia pacifica

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Pacific Loon

NE — Not Evaluated

Physical Characteristics

Attribute	Bigeye thresher	Pacific Loon
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.

Pacific Loon

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.