Big Finner vs Opal chimaera

Balaenoptera physalus compared with Chimaera opalescens

Key Differences

• Big Finner is Endangered while Opal chimaera is Least Concern.

Taxonomic Classification

Rank	Big Finner	Opal chimaera
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Holocephali (Holocephali)
Order	Cetacea (Whales & Dolphins)	Chimaeriformes (Chimaeriformes)
Family	Balaenopteridae (Rorquals)	Chimaeridae
Genus	Balaenoptera (Rorquals)	Chimaera
Species	Balaenoptera physalus	Chimaera opalescens

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Opal chimaera

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Opal chimaera
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.

Opal chimaera

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.