Big Water Crayfish vs Giant Otter

Cambarus robustus compared with Pteronura brasiliensis

Key Differences

• Big Water Crayfish is Least Concern while Giant Otter is Endangered.

Taxonomic Classification

Rank	Big Water Crayfish	Giant Otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Malacostraca (Crustaceans)	Mammalia (Mammals)
Order	Decapoda (Decapoda)	Carnivora (Carnivorans)
Family	Cambaridae	Mustelidae (Weasels & Otters)
Genus	Cambarus	Pteronura
Species	Cambarus robustus	Pteronura brasiliensis

Evolutionary Relationship

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

Conservation Status

Big Water Crayfish

LC — Least Concern

Giant Otter

EN — Endangered

Physical Characteristics

Attribute	Big Water Crayfish	Giant Otter
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.

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. 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.