Bigeye Sixgill Shark vs Emperor Penguin

Hexanchus nakamurai compared with Aptenodytes forsteri

Taxonomic Classification

Rank	Bigeye Sixgill Shark	Emperor Penguin
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Elasmobranchii	Aves (chim)
Order	Hexanchiformes (Bộ Cá mập nguyên thủy)	Sphenisciformes (Penguins)
Family	Hexanchidae	Spheniscidae (Penguins)
Genus	Hexanchus	Aptenodytes (Great Penguins)
Species	Hexanchus nakamurai	Aptenodytes forsteri

Evolutionary Relationship

Bigeye Sixgill Shark and Emperor Penguin share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

Bigeye Sixgill Shark

NT — Near Threatened

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

Attribute	Bigeye Sixgill Shark	Emperor Penguin
Diet	—	Carnivore
Average Lifespan	—	20 years
Average Length	—	1.1 m
Average Weight	—	40.0 kg

Habitat & Geographic Range

Bigeye Sixgill Shark

Habitat

Native to Asia and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Taiwan and Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Bigeye Sixgill Shark

The Bigeye Sixgill Shark (Hexanchus nakamurai) is a species in the genus Hexanchus. It is currently classified as Near Threatened on the IUCN Red List. Native to Asia and South America, inhabiting ecosystems characteristic of the region.

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.