Boston facelina vs Common Seal

Facelina bostoniensis compared with Phoca vitulina

Key Differences

• Boston facelina is Least Concern while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Boston facelina	Common Seal
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Mammalia (Mammals)
Order	Nudibranchia (Nudibranchia)	Pinnipedia (Seals & Sea Lions)
Family	Facelinidae	Phocidae (True Seals)
Genus	Facelina	Phoca (Harbor Seals)
Species	Facelina bostoniensis	Phoca vitulina

Evolutionary Relationship

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

Conservation Status

Boston facelina

LC — Least Concern

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Boston facelina

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

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.

Boston facelina

The Boston Facelina (Facelina bostoniensis) is a species in the genus Facelina. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden