Common Seahorse vs Cotton Thistle

Hippocampus kuda compared with Onopordum acanthium

Key Differences

• Common Seahorse is Vulnerable while Cotton Thistle is Endangered.

Taxonomic Classification

Rank	Common Seahorse	Cotton Thistle
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Actinopterygii (Ray-finned Fish)	Magnoliopsida (Dicots)
Order	Perciformes (Perch-like Fish)	Asterales (Daisies & Sunflowers)
Family	Pomacentridae (Clownfish & Damselfish)	Asteraceae (Daisy Family)
Genus	Amphiprion (Clownfish)	Onopordum
Species	Hippocampus kuda	Onopordum acanthium

Conservation Status

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

Cotton Thistle

EN — Endangered

Physical Characteristics

Attribute	Common Seahorse	Cotton Thistle
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.

Cotton Thistle

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Georgia, India, Japan), Europe (22 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (Argentina, Brazil, Chile). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Seahorse

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

Shared Countries

Both species can be found in 3 countries:

🇦🇺 Australia 🇮🇳 India 🇯🇵 Japan