Bigeye thresher vs Emperor Penguin

Alopias pelagicus compared with Aptenodytes forsteri

Key Differences

• Bigeye thresher is Endangered while Emperor Penguin is Near Threatened.

Taxonomic Classification

Rank	Bigeye thresher	Emperor Penguin
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum same	Chordata (Kordalılar)	Chordata (Kordalılar)
Class	Chondrichthyes (Kıkırdaklı balıklar)	Aves (kuş)
Order	Lamniformes (Dik burunlular)	Sphenisciformes (Penguins)
Family	Alopiidae	Spheniscidae (Penguins)
Genus	Alopias	Aptenodytes (Great Penguins)
Species	Alopias pelagicus	Aptenodytes forsteri

Evolutionary Relationship

Bigeye thresher and Emperor Penguin share a common ancestor at the Phylum level: Chordata. (Kordalılar)

Conservation Status

Bigeye thresher

EN — Endangered

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Bigeye thresher

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Distributed across Colombia and Taiwan. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

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.