Green Sea Turtle vs Nile Crocodile

Chelonia mydas compared with Crocodylus niloticus

Key Differences

• Green Sea Turtle is Endangered while Nile Crocodile is Least Concern.
• Green Sea Turtle is herbivore while Nile Crocodile is carnivore.
• Nile Crocodile is 3.8x heavier than Green Sea Turtle.
• Green Sea Turtle lives longer (80 years vs 70 years).

Taxonomic Classification

Rank	Green Sea Turtle	Nile 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 niloticus

Evolutionary Relationship

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

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Nile Crocodile

LC — Least Concern

Population: ~500.0K

Trend: Stable →

Physical Characteristics

Attribute	Green Sea Turtle	Nile Crocodile
Diet	Herbivore	Carnivore
Average Lifespan	80 years	70 years
Average Length	1.2 m	5.0 m
Average Weight	200.0 kg	750.0 kg

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.

Nile Crocodile

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Distributed across Egypt, Kenya, Madagascar, South Africa, and Tanzania.

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.

Nile Crocodile

The Nile crocodile is one of the largest reptiles in the world and is found throughout sub-Saharan Africa.