arrow-finned squid vs Big Finner

Illex oxygonius compared with Balaenoptera physalus

Key Differences

• arrow-finned squid is Least Concern while Big Finner is Endangered.

Taxonomic Classification

Rank	arrow-finned squid	Big Finner
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Cephalopoda (Cephalopods)	Mammalia (Mammals)
Order	Oegopsida (Oegopsida)	Cetacea (Whales & Dolphins)
Family	Ommastrephidae	Balaenopteridae (Rorquals)
Genus	Illex	Balaenoptera (Rorquals)
Species	Illex oxygonius	Balaenoptera physalus

Evolutionary Relationship

arrow-finned squid and Big Finner share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

arrow-finned squid

LC — Least Concern

Big Finner

EN — Endangered

Physical Characteristics

Attribute	arrow-finned squid	Big Finner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arrow-finned squid

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.

arrow-finned squid

The Arrow-finned squid, Illex oxygonius, is a species. It is currently assessed as least concern on the IUCN Red List.

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.