Atlantic Stream Crayfish vs Big Finner

Austropotamobius pallipes compared with Balaenoptera physalus

Taxonomic Classification

Rank	Atlantic Stream Crayfish	Big Finner
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Malacostraca (Crustaceans)	Mammalia (Mammals)
Order	Decapoda (Decapoda)	Cetacea (Whales & Dolphins)
Family	Astacidae	Balaenopteridae (Rorquals)
Genus	Austropotamobius	Balaenoptera (Rorquals)
Species	Austropotamobius pallipes	Balaenoptera physalus

Evolutionary Relationship

Atlantic Stream Crayfish and Big Finner share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Atlantic Stream Crayfish

EN — Endangered

Big Finner

EN — Endangered

Physical Characteristics

Attribute	Atlantic Stream Crayfish	Big Finner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Stream Crayfish

Habitat

Inhabits temperate broadleaf and mixed forests and temperate coniferous forests within the Palearctic biogeographic realm.

Range

Distributed across Ireland and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

Atlantic Stream Crayfish

The Atlantic Stream Crayfish (Austropotamobius pallipes) is a species in the genus Austropotamobius. It is currently classified as Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and temperate coniferous forests within the Palearctic biogeographic realm.

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.