Leatherback Sea Turtle vs Sparsetooth dogfish

Dermochelys coriacea compared with Scymnodalatias oligodon

Key Differences

• Leatherback Sea Turtle is Vulnerable while Sparsetooth dogfish is Least Concern.

Taxonomic Classification

Rank	Leatherback Sea Turtle	Sparsetooth dogfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Reptilia (Reptiles)	Elasmobranchii
Order	Testudines (Turtles & Tortoises)	Squaliformes (Squaliformes)
Family	Cheloniidae (Sea Turtles)	Somniosidae
Genus	Chelonia (Green Sea Turtles)	Scymnodalatias
Species	Dermochelys coriacea	Scymnodalatias oligodon

Evolutionary Relationship

Leatherback Sea Turtle and Sparsetooth dogfish share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Sparsetooth dogfish

LC — Least Concern

Physical Characteristics

Attribute	Leatherback Sea Turtle	Sparsetooth dogfish
Diet	Carnivore	—
Average Lifespan	50 years	—
Average Length	2.0 m	—
Average Weight	500.0 kg	—

Habitat & Geographic Range

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.

Sparsetooth dogfish

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Chile.

Leatherback Sea Turtle

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