Blue Dolphin vs Hammerhead

Stenella coeruleoalba compared with Sphyrna corona

Key Differences

• Blue Dolphin is Least Concern while Hammerhead is Critically Endangered.

Taxonomic Classification

Rank	Blue Dolphin	Hammerhead
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Cetacea (Whales & Dolphins)	Carcharhiniformes (Ground Sharks)
Family	Delphinidae (Oceanic Dolphins)	Sphyrnidae (Hammerhead Sharks)
Genus	Stenella	Sphyrna (Hammerhead Sharks)
Species	Stenella coeruleoalba	Sphyrna corona

Evolutionary Relationship

Blue Dolphin and Hammerhead share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Blue Dolphin

LC — Least Concern

Hammerhead

CR — Critically Endangered

Physical Characteristics

Attribute	Blue Dolphin	Hammerhead
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela).

Hammerhead

Habitat

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

Blue Dolphin

Blue Dolphin (Stenella coeruleoalba) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.