Atlantic Gray Seal vs Boulder Lichen

Halichoerus grypus compared with Porpidia tuberculosa

Key Differences

• Atlantic Gray Seal is Vulnerable while Boulder Lichen is Least Concern.

Taxonomic Classification

Rank	Atlantic Gray Seal	Boulder Lichen
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Mammalia (Mammals)	Lecanoromycetes (Lecanoromycetes)
Order	Pinnipedia (Seals & Sea Lions)	Lecideales (Lecideales)
Family	Phocidae (True Seals)	Lecideaceae
Genus	Halichoerus	Porpidia
Species	Halichoerus grypus	Porpidia tuberculosa

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Boulder Lichen

LC — Least Concern

Physical Characteristics

Attribute	Atlantic Gray Seal	Boulder Lichen
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Gray Seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Boulder Lichen

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States.

Atlantic Gray Seal

The Atlantic Gray Seal (Halichoerus grypus) is a species in the genus Halichoerus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Boulder Lichen

The Boulder Lichen (Porpidia tuberculosa) is a species in the genus Porpidia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 4 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden