Emperor Penguin vs Northeastern Brazilian dogfish

Aptenodytes forsteri compared with Squalus bahiensis

Key Differences

Emperor Penguin is Near Threatened while Northeastern Brazilian dogfish is Data Deficient.

Taxonomic Classification

Rank	Emperor Penguin	Northeastern Brazilian dogfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Elasmobranchii
Order	Sphenisciformes (Penguins)	Squaliformes (Squaliformes)
Family	Spheniscidae (Penguins)	Squalidae
Genus	Aptenodytes (Great Penguins)	Squalus
Species	Aptenodytes forsteri	Squalus bahiensis

Evolutionary Relationship

Emperor Penguin and Northeastern Brazilian dogfish share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Northeastern Brazilian dogfish

DD — Data Deficient

Physical Characteristics

Attribute	Emperor Penguin	Northeastern Brazilian dogfish
Diet	Carnivore	—
Average Lifespan	20 years	—
Average Length	1.1 m	—
Average Weight	40.0 kg	—

Habitat & Geographic Range

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.

Northeastern Brazilian dogfish

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.