Green Sea Turtle vs Sea Knotgrass

Chelonia mydas compared with Polygonum maritimum

Key Differences

• Green Sea Turtle is Endangered while Sea Knotgrass is Not Evaluated.

Taxonomic Classification

Rank	Green Sea Turtle	Sea Knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Reptilia (Reptiles)	Magnoliopsida (Dicots)
Order	Testudines (Turtles & Tortoises)	Caryophyllales (Caryophyllales)
Family	Cheloniidae (Sea Turtles)	Polygonaceae
Genus	Chelonia (Green Sea Turtles)	Polygonum
Species	Chelonia mydas	Polygonum maritimum

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Sea Knotgrass

NE — Not Evaluated

Physical Characteristics

Attribute	Green Sea Turtle	Sea Knotgrass
Diet	Herbivore	—
Average Lifespan	80 years	—
Average Length	1.2 m	—
Average Weight	200.0 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.

Sea Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Chile, India, and Portugal.

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.