Far Eastern Brook Lamprey vs Leatherback Sea Turtle

Lethenteron reissneri compared with Dermochelys coriacea

Key Differences

• Far Eastern Brook Lamprey is Least Concern while Leatherback Sea Turtle is Vulnerable.

Taxonomic Classification

Rank	Far Eastern Brook Lamprey	Leatherback Sea Turtle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Petromyzonti (Petromyzonti)	Reptilia (Reptiles)
Order	Petromyzontiformes (lamprey)	Testudines (Turtles & Tortoises)
Family	Petromyzontidae	Cheloniidae (Sea Turtles)
Genus	Lethenteron	Chelonia (Green Sea Turtles)
Species	Lethenteron reissneri	Dermochelys coriacea

Evolutionary Relationship

Far Eastern Brook Lamprey and Leatherback Sea Turtle share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Far Eastern Brook Lamprey

LC — Least Concern

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Far Eastern Brook Lamprey	Leatherback Sea Turtle
Diet	—	Carnivore
Average Lifespan	—	50 years
Average Length	—	2.0 m
Average Weight	—	500.0 kg

Habitat & Geographic Range

Far Eastern Brook Lamprey

Leatherback 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 5 distinct biome types spanning the Australasia and Indomalayan and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Leatherback Sea Turtle

The leatherback is the largest living turtle and the fourth-heaviest reptile. Unlike other turtles, it has a soft, leathery shell.