Atlantic Gray Seal vs Blacktail spurdog

Halichoerus grypus compared with Squalus melanurus

Key Differences

• Atlantic Gray Seal is Vulnerable while Blacktail spurdog is Data Deficient.

Taxonomic Classification

Rank	Atlantic Gray Seal	Blacktail spurdog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Pinnipedia (Seals & Sea Lions)	Squaliformes (Squaliformes)
Family	Phocidae (True Seals)	Squalidae
Genus	Halichoerus	Squalus
Species	Halichoerus grypus	Squalus melanurus

Evolutionary Relationship

Atlantic Gray Seal and Blacktail spurdog share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Blacktail spurdog

DD — Data Deficient

Physical Characteristics

Attribute	Atlantic Gray Seal	Blacktail spurdog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Gray Seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Blacktail spurdog

Atlantic Gray Seal

The Atlantic Gray Seal (Halichoerus grypus) is a species in the genus Halichoerus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Blacktail spurdog

The Blacktail spurdog (Squalus melanurus) is a species in the genus Squalus. It is currently classified as Data Deficient on the IUCN Red List.