Haviside s Dolphin vs sei whale

Cephalorhynchus heavisidii compared with Balaenoptera borealis

Key Differences

• Haviside s Dolphin is Near Threatened while sei whale is Endangered.

Taxonomic Classification

Rank	Haviside s Dolphin	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	Delphinidae (Oceanic Dolphins)	Balaenopteridae (Rorquals)
Genus	Cephalorhynchus	Balaenoptera (Rorquals)
Species	Cephalorhynchus heavisidii	Balaenoptera borealis

Evolutionary Relationship

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

Conservation Status

Haviside s Dolphin

NT — Near Threatened

sei whale

EN — Endangered

Physical Characteristics

Attribute	Haviside s Dolphin	sei whale
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Haviside s Dolphin

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.