Atlantic Gray Seal vs brown slug

Halichoerus grypus compared with Deroceras laeve

Key Differences

• Atlantic Gray Seal is Vulnerable while brown slug is Least Concern.

Taxonomic Classification

Rank	Atlantic Gray Seal	brown slug
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Pinnipedia (Seals & Sea Lions)	Stylommatophora (Stylommatophora)
Family	Phocidae (True Seals)	Agriolimacidae
Genus	Halichoerus	Deroceras
Species	Halichoerus grypus	Deroceras laeve

Evolutionary Relationship

Atlantic Gray Seal and brown slug share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

brown slug

LC — Least Concern

Physical Characteristics

Attribute	Atlantic Gray Seal	brown slug
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.

brown slug

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, tropical and subtropical moist broadleaf forests, and temperate broadleaf and mixed forests, among 7 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Cabo Verde, Sao Tome and Principe, South Africa), Asia (4 countries), Europe (9 countries), North America (Guatemala, Mexico, United States), Oceania and the Pacific (New Zealand), and South America (5 countries).

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.

brown slug

The Brown Slug (Deroceras laeve) is a species in the genus Deroceras. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including tropical and subtropical dry broadleaf forests, tropical and subtropical moist broadleaf forests, and temperate broadleaf and mixed forests, among 7 distinct biome types. Populations are also fo

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden