Bladder Fern vs Common Seahorse

Cystopteris fragilis compared with Hippocampus kuda

Key Differences

• Bladder Fern is Not Evaluated while Common Seahorse is Vulnerable.

Taxonomic Classification

Rank	Bladder Fern	Common Seahorse
Kingdom	Plantae (พืช)	Animalia (สัตว์)
Phylum	Tracheophyta	Chordata (สัตว์มีแกนสันหลัง)
Class	Polypodiopsida (Polypodiopsida)	Actinopterygii (Ray-finned Fish)
Order	Polypodiales (Polypodiales)	Perciformes (อันดับปลากะพง)
Family	Cystopteridaceae	Pomacentridae (Clownfish & Damselfish)
Genus	Cystopteris	Amphiprion (Clownfish)
Species	Cystopteris fragilis	Hippocampus kuda

Conservation Status

Bladder Fern

NE — Not Evaluated

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

Physical Characteristics

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

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).

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.

Bladder Fern

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

Common Seahorse

The common seahorse is found in tropical and temperate waters. Males carry and deliver the babies.