Common Seal vs Threeleaf Halberd Fern

Phoca vitulina compared with Tectaria trifoliata

Taxonomic Classification

Rank	Common Seal	Threeleaf Halberd Fern
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Tracheophyta
Class	Mammalia (Mammals)	Polypodiopsida (Polypodiopsida)
Order	Pinnipedia (Seals & Sea Lions)	Polypodiales (Polypodiales)
Family	Phocidae (True Seals)	Tectariaceae
Genus	Phoca (Harbor Seals)	Tectaria
Species	Phoca vitulina	Tectaria trifoliata

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Threeleaf Halberd Fern

NT — Near Threatened

Physical Characteristics

Attribute	Common Seal	Threeleaf Halberd Fern
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.

Threeleaf Halberd Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Brazil, Colombia, and Cuba. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.