Bighead catshark vs Canadian beaver

Apristurus bucephalus compared with Castor canadensis

Key Differences

• Bighead catshark is Data Deficient while Canadian beaver is Not Evaluated.

Taxonomic Classification

Rank	Bighead catshark	Canadian beaver
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Carcharhiniformes (Ground Sharks)	Rodentia (Rodents)
Family	Scyliorhinidae	Castoridae (Beavers)
Genus	Apristurus	Castor (Beavers)
Species	Apristurus bucephalus	Castor canadensis

Evolutionary Relationship

Bighead catshark and Canadian beaver share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bighead catshark

DD — Data Deficient

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Physical Characteristics

Attribute	Bighead catshark	Canadian beaver
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	1.0 m
Average Weight	—	25.0 kg

Habitat & Geographic Range

Bighead catshark

Habitat

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

Canadian beaver

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Widely distributed across Europe (15 countries), North America (United States), and South America (Argentina, Chile).

Bighead catshark

The Bighead catshark (Apristurus bucephalus) is a species in the genus Apristurus. Typically found in marine environments from coastal waters to deep ocean.

Canadian beaver

The largest rodent in North America, Canadian beavers weigh up to 32 kg and are master ecosystem engineers inhabiting rivers, lakes, and wetlands across Canada and the northern United States. By felling trees and constructing dams up to hundreds of meters long, beavers create ponds that provide habitat for hundreds of species. Their lodges and canals transform entire watersheds. Once nearly hunted to extinction for their fur, beaver populations have recovered strongly.