Alpine Bladder-fern vs Bigeye thresher

Cystopteris alpina compared with Alopias pelagicus

Key Differences

• Alpine Bladder-fern is Near Threatened while Bigeye thresher is Endangered.

Taxonomic Classification

Rank	Alpine Bladder-fern	Bigeye thresher
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Tracheophyta	Chordata (Chordates)
Class	Polypodiopsida (Polypodiopsida)	Chondrichthyes (Cartilaginous Fish)
Order	Polypodiales (Polypodiales)	Lamniformes (Mackerel Sharks)
Family	Cystopteridaceae	Alopiidae
Genus	Cystopteris	Alopias
Species	Cystopteris alpina	Alopias pelagicus

Conservation Status

Alpine Bladder-fern

NT — Near Threatened

Bigeye thresher

EN — Endangered

Physical Characteristics

Attribute	Alpine Bladder-fern	Bigeye thresher
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Bladder-fern

Habitat

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

Range

Distributed across Norway and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Bigeye thresher

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

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

Alpine Bladder-fern

The Alpine Bladder-fern (Cystopteris alpina) is a species in the genus Cystopteris. It is currently classified as Near Threatened on the IUCN Red List. Typically found in moist, shaded forest floors and tropical canopies. Distributed across Norway and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.