Big Finner vs Short-tailed river stingray

Balaenoptera physalus compared with Potamotrygon brachyura

Key Differences

• Big Finner is Endangered while Short-tailed river stingray is Data Deficient.

Taxonomic Classification

Rank	Big Finner	Short-tailed river stingray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Myliobatiformes (Myliobatiformes)
Family	Balaenopteridae (Rorquals)	Potamotrygonidae
Genus	Balaenoptera (Rorquals)	Potamotrygon
Species	Balaenoptera physalus	Potamotrygon brachyura

Evolutionary Relationship

Big Finner and Short-tailed river stingray share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big Finner

EN — Endangered

Short-tailed river stingray

DD — Data Deficient

Physical Characteristics

Attribute	Big Finner	Short-tailed river stingray
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.

Short-tailed river stingray

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.