Black ghost shark vs Green Sea Turtle

Hydrolagus homonycteris compared with Chelonia mydas

Key Differences

• Black ghost shark is Least Concern while Green Sea Turtle is Endangered.

Taxonomic Classification

Rank	Black ghost shark	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	Holocephali (全头亚纲)	Reptilia (爬行纲)
Order	Chimaeriformes (银鲛目)	Testudines (龟鳖目)
Family	Chimaeridae	Cheloniidae (Sea Turtles)
Genus	Hydrolagus	Chelonia (Green Sea Turtles)
Species	Hydrolagus homonycteris	Chelonia mydas

Evolutionary Relationship

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

Conservation Status

Black ghost shark

LC — Least Concern

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Black ghost shark	Green Sea Turtle
Diet	—	Herbivore
Average Lifespan	—	80 years
Average Length	—	1.2 m
Average Weight	—	200.0 kg

Habitat & Geographic Range

Black ghost shark

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.

Black ghost shark

The Black ghost shark (Hydrolagus homonycteris) is a species in the genus Hydrolagus. It is currently classified as Least Concern on the IUCN Red List.

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。