Black Knot vs Common Seal

Apiosporina morbosa compared with Phoca vitulina

Key Differences

Black Knot is Not Evaluated while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Black Knot	Common Seal
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Dothideomycetes (Dothideomycetes)	Mammalia (Mammals)
Order	Venturiales (Venturiales)	Pinnipedia (Seals & Sea Lions)
Family	Venturiaceae	Phocidae (True Seals)
Genus	Apiosporina	Phoca (Harbor Seals)
Species	Apiosporina morbosa	Phoca vitulina

Conservation Status

Black Knot

NE — Not Evaluated

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Black Knot

Habitat

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

Range

Distributed across Denmark, Norway, and United States.

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.

Black Knot

The Black Knot (Apiosporina morbosa) is a species in the genus Apiosporina. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Its geographic range spans Distributed across Denmark, Norway, 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.