Eurasian beaver vs sea thread hydroid

Castor fiber compared with Obelia dichotoma

Key Differences

• Eurasian beaver is Vulnerable while sea thread hydroid is Not Evaluated.

Taxonomic Classification

Rank	Eurasian beaver	sea thread hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Cnidaria (Cnidarians)
Class	Mammalia (Mammals)	Hydrozoa (Hydrozoa)
Order	Rodentia (Rodents)	Leptothecata (Leptothecata)
Family	Castoridae (Beavers)	Campanulariidae
Genus	Castor (Beavers)	Obelia
Species	Castor fiber	Obelia dichotoma

Evolutionary Relationship

Eurasian beaver and sea thread hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Eurasian beaver

VU — Vulnerable

sea thread hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	Eurasian beaver	sea thread hydroid
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Eurasian beaver

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

sea thread hydroid

Habitat

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

Range

Widely distributed across Africa (South Africa), Europe (5 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Argentina, Chile).

Eurasian beaver

Eurasian beaver (Castor fiber) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden