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Join our hands to conserve nature!

Green Turtle

Scientific Name

Chelonia mydas

Other Common Name(s)

Black Turtle

Body Length

80-150 cm

Body Weight

Up to 200 kg

Distribution

Tropical waters and some parts of subtropical regions around the globe

Fun Facts

Green turtles lay their eggs on the beaches where they were hatched. In other words, they hatch from the same places their mothers and grandmothers were born. To return to the breeding site from foraging areas, females can travel up to about 4,800 km across the ocean.

The sex of green turtle hatchlings depends on the temperature in the nest. The eggs can be incubated between 25°C to 33°C. Within this range, cooler temperatures produce more males while warmer temperatures favour females. Intermediate conditions give a more balanced sex ratio.

Threats & Conservation

IUCN Red List: Endangered

CITES: Appendix I

Chinese Wildlife Conservation Law: Category 1

Green turtles are threatened by overharvesting and habitat degradation. The eggs, juveniles and adults are taken as food by some people. As their nesting locations are predictable, they are susceptible to exploitation. The harvest of algae reduces food availability for adult turtles, which feed on these plants. At the same time, the nesting and feeding sites are degraded in various ways, such as through coastal development, pollution and altering the coastlines. Green turtles can be harmed by ingesting or getting entangled in plastic debris. Sand replenishment and reduction of coastal vegetation could alter the temperature of the sand, thus giving rise to populations with a biased sex ratio.

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Ocean Park Hong Kong, 180 Wong Chuk Hang Road, Aberdeen, Hong Kong Tel: (852) 3923 2323 Fax: (852) 2873 5584

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