Common Seal vs field slug

Phoca vitulina compared with Deroceras agreste

Key Differences

Common Seal is Near Threatened while field slug is Least Concern.

Taxonomic Classification

Rank	Common Seal	field 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	Phoca (Harbor Seals)	Deroceras
Species	Phoca vitulina	Deroceras agreste

Evolutionary Relationship

Common Seal and field slug share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

field slug

LC — Least Concern

Physical Characteristics

Attribute	Common Seal	field slug
Diet	Carnivore	—
Average Lifespan	30 years	—
Average Length	1.7 m	—
Average Weight	80.0 kg	—

Habitat & Geographic Range

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

field slug

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Widely distributed across Europe (5 countries), North America (United States), and South America (Argentina, Chile, Paraguay).

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.