Arnoux's beaked whale vs sei whale

Berardius arnuxii compared with Balaenoptera borealis

Key Differences

• Arnoux's beaked whale is Least Concern while sei whale is Endangered.

Taxonomic Classification

Rank	Arnoux's beaked whale	sei whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Cetacea (Whales & Dolphins)	Cetacea (Whales & Dolphins)
Family	Hyperoodontidae	Balaenopteridae (Rorquals)
Genus	Berardius	Balaenoptera (Rorquals)
Species	Berardius arnuxii	Balaenoptera borealis

Evolutionary Relationship

Arnoux's beaked whale and sei whale share a common ancestor at the Order level: Cetacea. (Whales & Dolphins)

Conservation Status

Arnoux's beaked whale

LC — Least Concern

sei whale

EN — Endangered

Physical Characteristics

Attribute	Arnoux's beaked whale	sei whale
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arnoux's beaked whale

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

sei whale

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Arnoux's beaked whale

The Arnoux's beaked whale, Berardius arnuxii, is a species. It is currently assessed as least concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.