Big Finner vs Deceitful Crayfish

Balaenoptera physalus compared with Procambarus fallax

Key Differences

• Big Finner is Endangered while Deceitful Crayfish is Not Evaluated.

Taxonomic Classification

Rank	Big Finner	Deceitful Crayfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Malacostraca (Crustaceans)
Order	Cetacea (Whales & Dolphins)	Decapoda (Decapoda)
Family	Balaenopteridae (Rorquals)	Cambaridae
Genus	Balaenoptera (Rorquals)	Procambarus
Species	Balaenoptera physalus	Procambarus fallax

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Deceitful Crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	Big Finner	Deceitful Crayfish
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.

Deceitful Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Distributed across Estonia, Germany, Norway, Sweden, and Ukraine.

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.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden