Blue Roundhead vs Common Seal

Stropharia caerulea compared with Phoca vitulina

Key Differences

• Blue Roundhead is Not Evaluated while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Blue Roundhead	Common Seal
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (Mammals)
Order	Agaricales (Gilled Mushrooms)	Pinnipedia (Seals & Sea Lions)
Family	Strophariaceae	Phocidae (True Seals)
Genus	Stropharia	Phoca (Harbor Seals)
Species	Stropharia caerulea	Phoca vitulina

Conservation Status

Blue Roundhead

NE — Not Evaluated

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Blue Roundhead

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Belgium, 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.

Blue Roundhead

The Blue Roundhead (Stropharia caerulea) is a species in the genus Stropharia. Typically found in forest floors, decomposing wood, and soil ecosystems.

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:

🇧🇪 Belgium 🇳🇴 Norway 🇺🇸 United States