Common Seal vs Pleated tunicate

Phoca vitulina compared with Styela plicata

Key Differences

Common Seal is Near Threatened while Pleated tunicate is Not Evaluated.

Taxonomic Classification

Rank	Common Seal	Pleated tunicate
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Ascidiacea (Ascidiacea)
Order	Pinnipedia (Seals & Sea Lions)	Stolidobranchia (Stolidobranchia)
Family	Phocidae (True Seals)	Styelidae
Genus	Phoca (Harbor Seals)	Styela
Species	Phoca vitulina	Styela plicata

Evolutionary Relationship

Common Seal and Pleated tunicate share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Pleated tunicate

NE — Not Evaluated

Physical Characteristics

Attribute	Common Seal	Pleated tunicate
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.

Pleated tunicate

Habitat

Native to Africa and Asia and Europe, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Africa (Senegal, South Africa), Asia (7 countries), Europe (11 countries), North America (Mexico, United States), Oceania and the Pacific (Australia, New Zealand), and South America (Brazil, Uruguay, Venezuela).

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.