common hydra vs Emperor Penguin

Hydra vulgaris compared with Aptenodytes forsteri

Key Differences

• common hydra is Not Evaluated while Emperor Penguin is Near Threatened.

Taxonomic Classification

Rank	common hydra	Emperor Penguin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Cnidaria (Cnidarians)	Chordata (Chordates)
Class	Hydrozoa (Hydrozoa)	Aves (Birds)
Order	Anthoathecata (Anthoathecata)	Sphenisciformes (Penguins)
Family	Hydridae	Spheniscidae (Penguins)
Genus	Hydra	Aptenodytes (Great Penguins)
Species	Hydra vulgaris	Aptenodytes forsteri

Evolutionary Relationship

common hydra and Emperor Penguin share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

common hydra

NE — Not Evaluated

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

Attribute	common hydra	Emperor Penguin
Diet	—	Carnivore
Average Lifespan	—	20 years
Average Length	—	1.1 m
Average Weight	—	40.0 kg

Habitat & Geographic Range

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Emperor Penguin

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.

Emperor Penguin

The world's largest penguin, emperor penguins stand up to 1.2 meters and weigh 45 kg, inhabiting the Antarctic continent in some of the most extreme conditions on Earth. They breed in midwinter darkness at temperatures below -60°C, with males incubating single eggs on their feet under a brood pouch for 65 days while females are at sea. Their huddling behavior — cycling individuals through the warm center of thousands-strong groups — is a masterclass in cooperative survival.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway