Common Seal vs robust pillar snail

Phoca vitulina compared with Cochlicopa nitens

Key Differences

• Common Seal is Near Threatened while robust pillar snail is Endangered.

Taxonomic Classification

Rank	Common Seal	robust pillar snail
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)	Cochlicopidae
Genus	Phoca (Harbor Seals)	Cochlicopa
Species	Phoca vitulina	Cochlicopa nitens

Evolutionary Relationship

Common Seal and robust pillar snail share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

robust pillar snail

EN — Endangered

Physical Characteristics

Attribute	Common Seal	robust pillar snail
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.

robust pillar snail

Habitat

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

Range

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

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.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇸🇪 Sweden