Blue Dolphin vs Speckled ray

Stenella coeruleoalba compared with Raja polystigma

Taxonomic Classification

Rank	Blue Dolphin	Speckled ray
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Mammalia (lớp Thú)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Rajiformes (Bộ Cá đuối)
Family	Delphinidae (Oceanic Dolphins)	Rajidae
Genus	Stenella	Raja
Species	Stenella coeruleoalba	Raja polystigma

Evolutionary Relationship

Blue Dolphin and Speckled ray share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

Blue Dolphin

LC — Least Concern

Speckled ray

LC — Least Concern

Physical Characteristics

Attribute	Blue Dolphin	Speckled 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).

Speckled 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.