Common Seahorse vs King/Common Eider

Hippocampus kuda compared with Somateria spectabilis

Key Differences

• Common Seahorse is Vulnerable while King/Common Eider is Not Evaluated.

Taxonomic Classification

Rank	Common Seahorse	King/Common Eider
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Actinopterygii (Ray-finned Fish)	Aves (Birds)
Order	Perciformes (Perch-like Fish)	Anseriformes (Anseriformes)
Family	Pomacentridae (Clownfish & Damselfish)	Anatidae
Genus	Amphiprion (Clownfish)	Somateria
Species	Hippocampus kuda	Somateria spectabilis

Evolutionary Relationship

Common Seahorse and King/Common Eider share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

King/Common Eider

NE — Not Evaluated

Physical Characteristics

Attribute	Common Seahorse	King/Common Eider
Diet	Carnivore	—
Average Lifespan	5 years	—
Average Length	17 cm	—
Average Weight	10 g	—

Habitat & Geographic Range

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.

King/Common Eider

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Common Seahorse

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