Big Finner vs Flathead guitarfish

Balaenoptera physalus compared with Pseudobatos planiceps

Key Differences

• Big Finner is Endangered while Flathead guitarfish is Vulnerable.

Taxonomic Classification

Rank	Big Finner	Flathead guitarfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Rhinopristiformes (Rhinopristiformes)
Family	Balaenopteridae (Rorquals)	Rhinobatidae
Genus	Balaenoptera (Rorquals)	Pseudobatos
Species	Balaenoptera physalus	Pseudobatos planiceps

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Flathead guitarfish

VU — Vulnerable

Physical Characteristics

Attribute	Big Finner	Flathead guitarfish
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.

Flathead guitarfish

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Chile. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.