Crested shark vs Green Sea Turtle

Galeus arae compared with Chelonia mydas

Key Differences

• Crested shark is Least Concern while Green Sea Turtle is Endangered.

Taxonomic Classification

Rank	Crested 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	Chondrichthyes (软骨鱼纲)	Reptilia (爬行纲)
Order	Carcharhiniformes (真鲨目)	Testudines (龟鳖目)
Family	Scyliorhinidae	Cheloniidae (Sea Turtles)
Genus	Galeus	Chelonia (Green Sea Turtles)
Species	Galeus arae	Chelonia mydas

Evolutionary Relationship

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

Conservation Status

Crested shark

LC — Least Concern

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Crested shark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

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.

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。