Big Finner vs Big Water Crayfish

Balaenoptera physalus compared with Cambarus robustus

Key Differences

• Big Finner is Endangered while Big Water Crayfish is Least Concern.

Taxonomic Classification

Rank	Big Finner	Big Water 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)	Cambarus
Species	Balaenoptera physalus	Cambarus robustus

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Big Water Crayfish

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Big Water 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.

Big Water Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in United States.

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.

Big Water Crayfish

The Big Water Crayfish (Cambarus robustus) is a species in the genus Cambarus. It is currently classified as Least Concern on the IUCN Red List. Typically found in marine, freshwater, and terrestrial environments.