Green Turtle | Oceana
Home / Green Turtle

Marine Life Encyclopedia

Sea Turtles & Reptiles

Green Turtle

Chelonia mydas

Distribution

Worldwide in tropical to temperate latitudes

ECOSYSTEM/HABITAT

Seagrass beds

FEEDING HABITS

Herbivore

TAXONOMY

Order Testudines (turtles, tortoises and terrapins), Family Cheloniidae (hard-shelled sea turtles)

The green turtle is the largest species in the family of hard-shelled sea turtles and second largest to the leatherback turtle among all sea turtles. Its common name comes not from the color of its skin or shell, which is common among most sea turtle species, but from the greenish color of its fat. The green turtle is the only sea turtle that is a strict herbivore, and its diet of seagrass and algae may contribute to the green fatty tissue.

Similarly to other sea turtles, green turtles are known to travel incredibly long distances during their lifetimes. In some cases, individuals may travel across entire ocean basins from their feeding areas to nesting beaches in the tropics and sub-tropics. Green turtles use the earth’s magnetic field like an invisble map to navigate throughout their migrations. Like other marine turtles, female green turtles return to the same beach where they hatched to nest. The two largest remaining nesting areas (in terms of numbers of nesting females) for green turtles are the Caribbean coast of Central America and the Great Barrier Reef in Australia.

Females will lay about 100 eggs per clutch and will nest several times over a few weeks. Once the eggs hatch, baby green turtles will make their way to the water and swim to offshore areas, where they will live for several years. Once juveniles reach a certain age and size range, they will leave the open ocean and travel to nearshore foraging grounds, where they shift to being primarily herbivores with a diet mainly consisting of seagrasses and algae. Both juvenile and adult green turtles are generally found nearshore, especially in areas with seagrass beds. Although green turtles generally only come to shore to nest, there is at least one population of green turtles (in Maui, Hawaii) that includes some individuals that are known to climb on beaches during the day, to rest in the sun.

The primary threats facing green turtles are degradation and loss of nesting and foraging habitats, direct killing of turtles and harvest of eggs, vessel strikes, accidentally being captured as bycatch in commercial or recreational fishing gear, and entanglement in or ingestion of marine debris. Although many countries around the world offer green turtles some or complete legal protection, threats to their nesting beaches and direct killing of turtles for their meat and collection of eggs still persist. All of these threats combined have caused green turtle populations to decrease to dangerously low levels.

Fun Facts About Green Turtles

1. The green turtle is the largest species of hard-shelled turtles, and is the second largest of all sea turtles.

2. Green turtles are 3 to 4 feet (91 to 122 cm) long and weigh 300 to 350 pounds (136 to 159 kg).

3. Green turtles are thought to live for 60 to 70 years, reaching sexual maturity at 25 to 35 years old.

4. Green turtles are named after their green-colored fat, which they get from their herbivorous diet of seagrass and algae.

5. Green turtles live all over the world and can be found off the coasts of more than 140 countries.

6. Typically, only female sea turtles will visit shores during their lifetime, but male and female green turtles are known to come ashore and bask in the sun on Hawaiian beaches.1

7. Female green turtles return to the same beach where they were born to nest, no matter how far it is.2

Engage Youth with Sailors for the Sea

Oceana joined forces with Sailors for the Sea, an ocean conservation organization dedicated to educating and engaging the world’s boating community. Sailors for the Sea developed the KELP (Kids Environmental Lesson Plans) program to create the next generation of ocean stewards. Click here or below to download hands-on marine science activities for kids.

Kids Environmental Lesson Plans

References:

1 NOAA Fisheries

2 Current Biology

Get Involved

Donate Today

SUPPORT OUR WORK TO PROTECT THE OCEANS BY GIVING TODAY

With the support of more than 1 million activists like you, we have already protected nearly 4 million square miles of ocean.

Donate Now

TAKE ACTION NOW

Support policy change for the oceans

Decision-makers need to hear from ocean lovers like you. Make your voice heard!

Sign Now

VISIT OUR ADOPTION CENTER

SYMBOLICALLY ADOPT AN ANIMAL TODAY

Visit our online store to see all the ocean animals you can symbolically adopt, either for yourself or as a gift for someone else.

Shop Today

DOWNLOAD OCEAN ACTIVITIES

HELP KIDS DISCOVER OUR BLUE PLANET

Our free KELP (Kids Environmental Lesson Plans) empower children to learn about and protect our oceans!

Learn More

FEATURED CAMPAIGN

Save the Oceans, Feed the World

We are restoring the world’s wild fish populations to serve as a sustainable source of protein for people.

Learn More

More Campaigns

Protect Habitat

Bycatch

Plastics

View All

CONTACT

Oceana International Headquarters
1025 Connecticut Avenue, Suite 200
Washington, DC 20036 USA

General Inquiries
+1(202)-833-3900
info@oceana.org

Donation Inquiries
+1(202)-996-7174
wavemaker@oceana.org

Press Inquiries
+1(202)-833-3900
press@oceana.org

OCEANA'S EFFICIENCY

BECOME A WAVEMAKER

Sign up today to get weekly updates and action alerts from Oceana.

SHOW YOUR SUPPORT WITH A DONATION

We have already protected nearly 4 million square miles of ocean and innumerable sea life - but there is still more to be done.

Donate Now

QUICK LINKS: