Big Finner vs Bigeye Numbfish

Balaenoptera physalus compared with Narcine oculifera

Key Differences

• Big Finner is Endangered while Bigeye Numbfish is Data Deficient.

Taxonomic Classification

Rank	Big Finner	Bigeye Numbfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Torpediniformes (electric ray)
Family	Balaenopteridae (Rorquals)	Narcinidae
Genus	Balaenoptera (Rorquals)	Narcine
Species	Balaenoptera physalus	Narcine oculifera

Evolutionary Relationship

Big Finner and Bigeye Numbfish share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big Finner

EN — Endangered

Bigeye Numbfish

DD — Data Deficient

Physical Characteristics

Attribute	Big Finner	Bigeye Numbfish
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.

Bigeye Numbfish

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.

Bigeye Numbfish

The Bigeye Numbfish (Narcine oculifera) is a species in the genus Narcine.