Alpine Bladder-fern vs Common Seahorse

Cystopteris alpina compared with Hippocampus kuda

Key Differences

Alpine Bladder-fern is Near Threatened while Common Seahorse is Vulnerable.

Taxonomic Classification

Rank	Alpine Bladder-fern	Common Seahorse
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Tracheophyta	Chordata (Chordates)
Class	Polypodiopsida (Polypodiopsida)	Actinopterygii (Ray-finned Fish)
Order	Polypodiales (Polypodiales)	Perciformes (Perch-like Fish)
Family	Cystopteridaceae	Pomacentridae (Clownfish & Damselfish)
Genus	Cystopteris	Amphiprion (Clownfish)
Species	Cystopteris alpina	Hippocampus kuda

Conservation Status

Alpine Bladder-fern

NT — Near Threatened

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

Physical Characteristics

Attribute	Alpine Bladder-fern	Common Seahorse
Diet	—	Carnivore
Average Lifespan	—	5 years
Average Length	—	17 cm
Average Weight	—	10 g

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.

Common Seahorse

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 7 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, India, Indonesia, Japan, and Philippines. Currently classified as Vulnerable 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.