Black roughscale catshark vs Northern Emerald

Apristurus melanoasper compared with Somatochlora arctica

Key Differences

• Black roughscale catshark is Least Concern while Northern Emerald is Endangered.

Taxonomic Classification

Rank	Black roughscale catshark	Northern Emerald
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Chondrichthyes (Cartilaginous Fish)	Insecta (Insects)
Order	Carcharhiniformes (Ground Sharks)	Odonata (Odonata)
Family	Scyliorhinidae	Corduliidae
Genus	Apristurus	Somatochlora
Species	Apristurus melanoasper	Somatochlora arctica

Evolutionary Relationship

Black roughscale catshark and Northern Emerald share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Black roughscale catshark

LC — Least Concern

Northern Emerald

EN — Endangered

Physical Characteristics

Attribute	Black roughscale catshark	Northern Emerald
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black roughscale catshark

Habitat

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

Northern Emerald

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and Ukraine. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black roughscale catshark

The Black roughscale catshark (Apristurus melanoasper) is a species in the genus Apristurus. It is currently classified as Least Concern on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

Northern Emerald

Northern Emerald (Somatochlora arctica) 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.