Blue Dolphin vs Bonnet hammerhead

Stenella coeruleoalba compared with Sphyrna tiburo

Key Differences

• Blue Dolphin is Least Concern while Bonnet hammerhead is Endangered.

Taxonomic Classification

Rank	Blue Dolphin	Bonnet 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 tiburo

Evolutionary Relationship

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

Conservation Status

Blue Dolphin

LC — Least Concern

Bonnet hammerhead

EN — Endangered

Physical Characteristics

Attribute	Blue Dolphin	Bonnet 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).

Bonnet 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.

Bonnet hammerhead

The Bonnet hammerhead (Sphyrna tiburo) is a species in the genus Sphyrna. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.