Blue Dolphin vs Large-Neck Clam

Stenella coeruleoalba compared with Mya arenaria

Key Differences

• Blue Dolphin is Least Concern while Large-Neck Clam is Vulnerable.

Taxonomic Classification

Rank	Blue Dolphin	Large-Neck Clam
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Mammalia (哺乳類)	Bivalvia (二枚貝)
Order	Cetacea (Whales & Dolphins)	Myida (Myida)
Family	Delphinidae (Oceanic Dolphins)	Myidae
Genus	Stenella	Mya
Species	Stenella coeruleoalba	Mya arenaria

Evolutionary Relationship

Blue Dolphin and Large-Neck Clam share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Blue Dolphin

LC — Least Concern

Large-Neck Clam

VU — Vulnerable

Physical Characteristics

Attribute	Blue Dolphin	Large-Neck Clam
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).

Large-Neck Clam

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and temperate grasslands and steppes, among 5 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Georgia, Turkey), Europe (22 countries), and North America (Canada, United States). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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。

Large-Neck Clam

ミゾハマグリ（Mya arenaria）はIUCNレッドリストで危急（VU）に分類されている。野生での絶滅リスクが高く、個体数が減少し、生息地への圧力が増加している。

Shared Countries

Both species can be found in 5 countries:

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