Bladder Fern vs Foca de Casco

Cystopteris fragilis compared with Cystophora cristata

Key Differences

• Bladder Fern is Not Evaluated while Foca de Casco is Endangered.

Taxonomic Classification

Rank	Bladder Fern	Foca de Casco
Kingdom	Plantae (planta)	Animalia (Animals)
Phylum	Tracheophyta	Chordata (cordados)
Class	Polypodiopsida (Polypodiopsida)	Mammalia (mamíferos)
Order	Polypodiales (Polypodiales)	Pinnipedia (Seals & Sea Lions)
Family	Cystopteridaceae	Phocidae (True Seals)
Genus	Cystopteris	Cystophora
Species	Cystopteris fragilis	Cystophora cristata

Conservation Status

Bladder Fern

NE — Not Evaluated

Foca de Casco

EN — Endangered

Physical Characteristics

Attribute	Bladder Fern	Foca de Casco
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bladder Fern

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (Canada, United States), and South America (Colombia).

Foca de Casco

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Bladder Fern

The Bladder Fern (Cystopteris fragilis) is a species in the genus Cystopteris. Typically found in moist, shaded forest floors and tropical canopies.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇳🇴 Norway