Common Seahorse vs Thread Weed

Hippocampus kuda compared with Ulva compressa

Key Differences

• Common Seahorse is Vulnerable while Thread Weed is Least Concern.

Taxonomic Classification

Rank	Common Seahorse	Thread Weed
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Chlorophyta (Chlorophyta)
Class	Actinopterygii (Ray-finned Fish)	Ulvophyceae (Ulvophyceae)
Order	Perciformes (Perch-like Fish)	Ulvales (Ulvales)
Family	Pomacentridae (Clownfish & Damselfish)	Ulvaceae
Genus	Amphiprion (Clownfish)	Ulva
Species	Hippocampus kuda	Ulva compressa

Conservation Status

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

Thread Weed

LC — Least Concern

Physical Characteristics

Attribute	Common Seahorse	Thread Weed
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.

Thread Weed

Habitat

Native to Asia and Europe and Oceania, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), Oceania and the Pacific (New Zealand), and South America (Brazil).

Common Seahorse

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