Atlantic Humpbacked Dolphin vs Big Finner

Sousa teuszii compared with Balaenoptera physalus

Key Differences

• Atlantic Humpbacked Dolphin is Critically Endangered while Big Finner is Endangered.

Taxonomic Classification

Rank	Atlantic Humpbacked Dolphin	Big Finner
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	Sousa	Balaenoptera (Rorquals)
Species	Sousa teuszii	Balaenoptera physalus

Evolutionary Relationship

Atlantic Humpbacked Dolphin and Big Finner share a common ancestor at the Order level: Cetacea. (Whales & Dolphins)

Conservation Status

Atlantic Humpbacked Dolphin

CR — Critically Endangered

Big Finner

EN — Endangered

Physical Characteristics

Attribute	Atlantic Humpbacked Dolphin	Big Finner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Humpbacked Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Atlantic Humpbacked Dolphin

The Atlantic Humpbacked Dolphin (Sousa teuszii) is a species in the genus Sousa. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Big Finner

Big Finner (Balaenoptera physalus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.