Green Sea Turtle vs Large-Neck Clam

Chelonia mydas compared with Mya arenaria

Key Differences

• Green Sea Turtle is Endangered while Large-Neck Clam is Vulnerable.

Taxonomic Classification

Rank	Green Sea Turtle	Large-Neck Clam
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Reptilia (爬虫類)	Bivalvia (二枚貝)
Order	Testudines (カメ)	Myida (Myida)
Family	Cheloniidae (Sea Turtles)	Myidae
Genus	Chelonia (Green Sea Turtles)	Mya
Species	Chelonia mydas	Mya arenaria

Evolutionary Relationship

Green Sea Turtle and Large-Neck Clam share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Large-Neck Clam

VU — Vulnerable

Physical Characteristics

Attribute	Green Sea Turtle	Large-Neck Clam
Diet	Herbivore	—
Average Lifespan	80 years	—
Average Length	1.2 m	—
Average Weight	200.0 kg	—

Habitat & Geographic Range

Green Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, Brazil, Costa Rica, Indonesia, and Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Green Sea Turtle

アオウミガメは最も大きなウミガメの一つです。甲羅ではなく軟骨と脂肪の緑色に由来して名付けられました。

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。