Atlantic Gray Seal vs Brittle Bladderfern

Halichoerus grypus compared with Cystopteris tenuis

Key Differences

• Atlantic Gray Seal is Vulnerable while Brittle Bladderfern is Not Evaluated.

Taxonomic Classification

Rank	Atlantic Gray Seal	Brittle Bladderfern
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)	Cystopteridaceae
Genus	Halichoerus	Cystopteris
Species	Halichoerus grypus	Cystopteris tenuis

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Brittle Bladderfern

NE — Not Evaluated

Physical Characteristics

Attribute	Atlantic Gray Seal	Brittle Bladderfern
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.

Brittle Bladderfern

Habitat

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

Range

Distributed across Canada 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.

Brittle Bladderfern

The Brittle Bladderfern (Cystopteris tenuis) is a species in the genus Cystopteris. Typically found in moist, shaded forest floors and tropical canopies.