Green Sea Turtle vs Hard Shield Fern

Chelonia mydas compared with Polystichum aculeatum

Key Differences

• Green Sea Turtle is Endangered while Hard Shield Fern is Near Threatened.

Taxonomic Classification

Rank	Green Sea Turtle	Hard Shield Fern
Kingdom	Animalia (สัตว์)	Plantae (พืช)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Tracheophyta
Class	Reptilia (สัตว์เลื้อยคลาน)	Polypodiopsida (Polypodiopsida)
Order	Testudines (เต่า)	Polypodiales (Polypodiales)
Family	Cheloniidae (Sea Turtles)	Dryopteridaceae
Genus	Chelonia (Green Sea Turtles)	Polystichum
Species	Chelonia mydas	Polystichum aculeatum

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Hard Shield Fern

NT — Near Threatened

Physical Characteristics

Attribute	Green Sea Turtle	Hard Shield Fern
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.

Hard Shield Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.