brittlestar vs hydroid

Amphiura chiajei compared with Obelia longissima

Key Differences

• brittlestar is Least Concern while hydroid is Not Evaluated.

Taxonomic Classification

Rank	brittlestar	hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Echinodermata (Echinoderms)	Cnidaria (Cnidarians)
Class	Ophiuroidea (Ophiuroidea)	Hydrozoa (Hydrozoa)
Order	Amphilepidida (Amphilepidida)	Leptothecata (Leptothecata)
Family	Amphiuridae	Campanulariidae
Genus	Amphiura	Obelia
Species	Amphiura chiajei	Obelia longissima

Evolutionary Relationship

brittlestar and hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

brittlestar

LC — Least Concern

hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	brittlestar	hydroid
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

hydroid

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (Australia, New Zealand), and South America (Argentina).

brittlestar

The Brittlestar (Amphiura chiajei) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden