Birdbeak dogfish vs Leatherback Sea Turtle

Deania calcea compared with Dermochelys coriacea

Key Differences

• Birdbeak dogfish is Near Threatened while Leatherback Sea Turtle is Vulnerable.

Taxonomic Classification

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

Evolutionary Relationship

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

Conservation Status

Birdbeak dogfish

NT — Near Threatened

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Birdbeak dogfish

Habitat

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

Range

Distributed across Chile, Norway, and Taiwan. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Birdbeak dogfish

The Birdbeak dogfish (Deania calcea) is a species in the genus Deania. It is currently classified as Near Threatened on the IUCN Red List. Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Leatherback Sea Turtle

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