Big Finner vs Rough-Tailed

Balaenoptera physalus compared with Bathytoshia centroura

Key Differences

• Big Finner is Endangered while Rough-Tailed is Vulnerable.

Taxonomic Classification

Rank	Big Finner	Rough-Tailed
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum same	Chordata (حبليات)	Chordata (حبليات)
Class	Mammalia (ثدييات)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Myliobatiformes (لخمة بهشية)
Family	Balaenopteridae (Rorquals)	Dasyatidae
Genus	Balaenoptera (Rorquals)	Bathytoshia
Species	Balaenoptera physalus	Bathytoshia centroura

Evolutionary Relationship

Big Finner and Rough-Tailed share a common ancestor at the Phylum level: Chordata. (حبليات)

Conservation Status

Big Finner

EN — Endangered

Rough-Tailed

VU — Vulnerable

Physical Characteristics

Attribute	Big Finner	Rough-Tailed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Rough-Tailed

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.