Big Water Crayfish vs Brook Alder

Cambarus robustus compared with Alnus maritima

Key Differences

• Big Water Crayfish is Least Concern while Brook Alder is Endangered.

Taxonomic Classification

Rank	Big Water Crayfish	Brook Alder
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Arthropoda (Arthropods)	Magnoliophyta (Flowering Plants)
Class	Malacostraca (Crustaceans)	Magnoliopsida (Dicots)
Order	Decapoda (Decapoda)	Fagales (Beeches & Oaks)
Family	Cambaridae	Betulaceae
Genus	Cambarus	Alnus
Species	Cambarus robustus	Alnus maritima

Conservation Status

Big Water Crayfish

LC — Least Concern

Brook Alder

EN — Endangered

Physical Characteristics

Attribute	Big Water Crayfish	Brook Alder
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big Water Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in United States.

Brook Alder

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

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

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.

Brook Alder

The Brook Alder (Alnus maritima) is a species in the genus Alnus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.