Arctic lamprey vs Green Sea Turtle

Lethenteron camtschaticum compared with Chelonia mydas

Key Differences

• Arctic lamprey is Near Threatened while Green Sea Turtle is Endangered.

Taxonomic Classification

Rank	Arctic lamprey	Green Sea Turtle
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class	Petromyzonti (七鳃鳗纲)	Reptilia (爬行纲)
Order	Petromyzontiformes (七鰓鰻目)	Testudines (龟鳖目)
Family	Petromyzontidae	Cheloniidae (Sea Turtles)
Genus	Lethenteron	Chelonia (Green Sea Turtles)
Species	Lethenteron camtschaticum	Chelonia mydas

Evolutionary Relationship

Arctic lamprey and Green Sea Turtle share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

Arctic lamprey

NT — Near Threatened

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Arctic lamprey	Green Sea Turtle
Diet	—	Herbivore
Average Lifespan	—	80 years
Average Length	—	1.2 m
Average Weight	—	200.0 kg

Habitat & Geographic Range

Arctic lamprey

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Arctic lamprey

The Arctic lamprey (Lethenteron camtschaticum) is a species in the genus Lethenteron. It is currently classified as Near Threatened on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Green Sea Turtle

绿海龟是最大的海龟之一。其名称源于软骨和脂肪的绿色，而非龟壳的颜色。