Blue Dolphin vs Dwarf round ray

Stenella coeruleoalba compared with Urotrygon nana

Key Differences

• Blue Dolphin is Least Concern while Dwarf round ray is Near Threatened.

Taxonomic Classification

Rank	Blue Dolphin	Dwarf round ray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Myliobatiformes (Myliobatiformes)
Family	Delphinidae (Oceanic Dolphins)	Urotrygonidae
Genus	Stenella	Urotrygon
Species	Stenella coeruleoalba	Urotrygon nana

Evolutionary Relationship

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

Conservation Status

Blue Dolphin

LC — Least Concern

Dwarf round ray

NT — Near Threatened

Physical Characteristics

Attribute	Blue Dolphin	Dwarf round ray
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).

Dwarf round ray

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.