Green Sea Turtle vs Saltwater Crocodile

Chelonia mydas compared with Crocodylus porosus

Key Differences

• Green Sea Turtle is Endangered while Saltwater Crocodile is Least Concern.
• Green Sea Turtle is herbivore while Saltwater Crocodile is carnivore.
• Saltwater Crocodile is 5.0x heavier than Green Sea Turtle.
• Green Sea Turtle lives longer (80 years vs 70 years).

Taxonomic Classification

Rank	Green Sea Turtle	Saltwater Crocodile
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Reptilia (Reptiles)	Reptilia (Reptiles)
Order	Testudines (Turtles & Tortoises)	Crocodylia (Crocodilians)
Family	Cheloniidae (Sea Turtles)	Crocodylidae (Crocodiles)
Genus	Chelonia (Green Sea Turtles)	Crocodylus (True Crocodiles)
Species	Chelonia mydas	Crocodylus porosus

Evolutionary Relationship

Green Sea Turtle and Saltwater Crocodile share a common ancestor at the Class level: Reptilia. (Reptiles)

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Saltwater Crocodile

LC — Least Concern

Population: ~300.0K

Trend: Stable →

Physical Characteristics

Attribute	Green Sea Turtle	Saltwater Crocodile
Diet	Herbivore	Carnivore
Average Lifespan	80 years	70 years
Average Length	1.2 m	6.0 m
Average Weight	200.0 kg	1.0 t

Habitat & Geographic Range

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.

Saltwater Crocodile

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Distributed across Australia, India, Indonesia, Malaysia, and Philippines.

Green Sea Turtle

The green sea turtle is one of the largest sea turtles. They are named for the green color of their cartilage and fat, not their shells.

Saltwater Crocodile

The saltwater crocodile is the largest living reptile, found from eastern India to northern Australia.

Shared Countries

Both species can be found in 2 countries:

🇦🇺 Australia 🇮🇩 Indonesia