Eurasian beaver vs Gray smooth hound

Castor fiber compared with Mustelus californicus

Key Differences

• Eurasian beaver is Vulnerable while Gray smooth hound is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Gray smooth hound
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Rodentia (Rodents)	Carcharhiniformes (Ground Sharks)
Family	Castoridae (Beavers)	Triakidae
Genus	Castor (Beavers)	Mustelus
Species	Castor fiber	Mustelus californicus

Evolutionary Relationship

Eurasian beaver and Gray smooth hound share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian beaver

VU — Vulnerable

Gray smooth hound

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Gray smooth hound
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Eurasian beaver

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Gray smooth hound

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Eurasian beaver

Eurasian beaver (Castor fiber) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.