Blue Dolphin vs roker

Stenella coeruleoalba compared with Raja clavata

Key Differences

• Blue Dolphin is Least Concern while roker is Near Threatened.

Taxonomic Classification

Rank	Blue Dolphin	roker
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)	Rajidae
Genus	Stenella	Raja
Species	Stenella coeruleoalba	Raja clavata

Evolutionary Relationship

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

Conservation Status

Blue Dolphin

LC — Least Concern

roker

NT — Near Threatened

Physical Characteristics

Attribute	Blue Dolphin	roker
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).

roker

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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。

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden