Emperor Penguin vs Great Hammerhead

Aptenodytes forsteri compared with Sphyrna mokarran

Key Differences

• Emperor Penguin is Near Threatened while Great Hammerhead is Critically Endangered.
• Great Hammerhead is 11.2x heavier than Emperor Penguin.
• Great Hammerhead lives longer (40 years vs 20 years).

Taxonomic Classification

Rank	Emperor Penguin	Great Hammerhead
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Chondrichthyes (Cartilaginous Fish)
Order	Sphenisciformes (Penguins)	Carcharhiniformes (Ground Sharks)
Family	Spheniscidae (Penguins)	Sphyrnidae (Hammerhead Sharks)
Genus	Aptenodytes (Great Penguins)	Sphyrna (Hammerhead Sharks)
Species	Aptenodytes forsteri	Sphyrna mokarran

Evolutionary Relationship

Emperor Penguin and Great Hammerhead share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Great Hammerhead

CR — Critically Endangered

Trend: Decreasing ↓

Physical Characteristics

Attribute	Emperor Penguin	Great Hammerhead
Diet	Carnivore	Carnivore
Average Lifespan	20 years	40 years
Average Length	1.1 m	5.0 m
Average Weight	40.0 kg	450.0 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.

Great Hammerhead

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 5 distinct biome types spanning the Indomalayan and Neotropic and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

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

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.

Great Hammerhead

The largest hammerhead shark species, great hammerheads reach up to 6 meters and are found in tropical and subtropical coastal waters worldwide. Their distinctive T-shaped head (cephalofoil) dramatically increases sensory surface area for electroreception, enabling them to detect buried stingrays through sand with exceptional precision — stingrays are a preferred prey. Critically Endangered, with populations declining dramatically due to highly valued fins and bycatch mortality.