Common Seal vs Heath Threadwort

Phoca vitulina compared with Cephaloziella stellulifera

Key Differences

Common Seal is Near Threatened while Heath Threadwort is Data Deficient.

Taxonomic Classification

Rank	Common Seal	Heath Threadwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Marchantiophyta (liverwort)
Class	Mammalia (Mammals)	Jungermanniopsida (Jungermanniopsida)
Order	Pinnipedia (Seals & Sea Lions)	Jungermanniales (Jungermanniales)
Family	Phocidae (True Seals)	Cephaloziellaceae
Genus	Phoca (Harbor Seals)	Cephaloziella
Species	Phoca vitulina	Cephaloziella stellulifera

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Heath Threadwort

DD — Data Deficient

Physical Characteristics

Attribute	Common Seal	Heath Threadwort
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.

Heath Threadwort

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Sweden and United States.

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.