Blue Dolphin vs Ray

Stenella coeruleoalba compared with Bathyraja schroederi

Taxonomic Classification

Rank	Blue Dolphin	Ray
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Rajiformes (ガンギエイ目)
Family	Delphinidae (Oceanic Dolphins)	Arhynchobatidae
Genus	Stenella	Bathyraja
Species	Stenella coeruleoalba	Bathyraja schroederi

Evolutionary Relationship

Blue Dolphin and Ray share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Blue Dolphin

LC — Least Concern

Ray

LC — Least Concern

Physical Characteristics

Attribute	Blue Dolphin	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).

Ray

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Chile.

Blue Dolphin

スジイルカ（Stenella coeruleoalba）はIUCNレッドリストで軽度懸念（LC）に分類されています。分布域全体で広く豊富に生息し、個体数は安定しており、即座の保全上の懸念はありません。