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Meet the World’s Heaviest Reptile in 2023: The Leatherback Sea Turtle

leatherback turtle
A beautiful image of a leatherback turtle during sunrise. This picture is very unique because the turtle has been temporally blinded by sand sticking to its eye

The world’s heaviest reptile is the Leatherback Sea Turtle – let’s get to know them.

the heaviest reptile in the world

The animal world is intriguing and full of surprises. Meet the majestic leatherback sea turtle, the world’s heaviest reptile! These creatures are remarkable, reaching a maximum weight of almost 2,000 pounds and measuring up to seven feet long. 

Despite their huge size, they’re still able to captivate us with their graceful movement as they glide through the ocean’s depths. Likewise, Leatherback Turtles have captivated biologists for years due to their powerful jaws, which can crush hard-shelled prey.

Read on to learn more about this incredible species!

Key Points

  • The Leatherback Sea Turtle is the largest and heaviest of all turtles and reptiles in the world.
  • They can grow up to seven feet long and weigh over 2,000 pounds.
  • These incredible creatures are found in the world’s oceans but most commonly in the Pacific and Indian Oceans. 
  • It has a unique and highly specialized diet, feeding almost exclusively on jellyfish. This is because their powerful jaws can easily crush these creatures’ hard and slippery bodies.
  • They can dive down to over 4,000 feet, colder and darker than any other turtle.
  • The Leatherback Sea Turtle is considered endangered due to habitat loss and hunting, protecting nesting beaches and promoting sustainable fishing practices are vital to save them.

An Introduction to the World’s Heaviest Reptile

the heaviest reptile in the world

The Leatherback Sea Turtle is a fascinating reptile species that has captured people’s attention worldwide. 

This remarkable creature is widely known for being the world’s heaviest turtle (but also the world’s heaviest reptile.) They are able to weigh up to 2,000 pounds and exceed seven feet in length. As the largest of all living turtles, it’s no wonder the Leatherback Sea Turtle is such a star. 

But there’s more to this species than just its impressive size. These majestic creatures have a unique, soft shell of leathery skin and little bony plates.

They also have the extraordinary ability to travel thousands of miles searching for food and mates. Moreover, they can easily dive to depths of over 4,200 feet! With such incredible features, it’s easy to see why the Leatherback Sea Turtle is a species that is truly worth admiring.

Physical Characteristics of Leatherback Sea Turtles

leatherback sea turtle

If you were to come across a leatherback sea turtle, you would surely be in awe of its sheer size and unique appearance. 


As the largest turtle species, leatherbacks can grow up to seven feet long and almost weigh as much as a small car! But their impressive size is just one of the many remarkable features of these ocean dwellers.


They also possess a unique rubbery shell that sets them apart from other turtle species, and they can also swim at high speeds thanks to their streamlined body shape.



Leatherbacks have a typical diet for a turtle and mainly eat jellyfish, which are abundantly available throughout their native habitats.

With an impressive appetite, they consume an astonishing amount of jellyfish daily, often equal to their own body weight. These creatures are opportunistic feeders, using their powerful jaws and tooth-like cusps to capture and devour slippery prey. They search for jellyfish while swimming in open water, using their specialized jaws to ensure efficient consumption of their gelatinous prey.

Habitat and Threats

leatherback sea turtle

The leatherback sea turtle is a highly migratory species with a wide geographic range. They can be found in both tropical and temperate oceans, spanning across the Indian, Atlantic, and Pacific Oceans. Leatherbacks migrate vast distances, often traveling thousands of miles between their nesting and foraging grounds.

During the nesting season, female leatherbacks return to the beaches where they were born to lay their eggs. Preferring sandy beaches for nesting, especially those with gentle slopes and limited vegetation. These nesting sites are primarily located in tropical regions, including countries such as Costa Rica, Trinidad and Tobago, Indonesia, and Gabon

(Uncover the best places to spot sea turtles here)

However, these fantastic creatures face multiple threats, including habitat degradation, accidental capture in fishing gear, and poaching for their meat, eggs, and shells.

To ensure the survival of these remarkable animals, we must continue to work towards conservation efforts, protect their habitats, and raise awareness about the threats they face.

Fun Facts About Leatherback Sea Turtles 

leatherback sea turtle

Leatherback sea turtles are fascinating creatures that are full of surprises. We bet you didn’t know that:

  • They can cross the entire Pacific Ocean in just one year as they migrate between their nesting and foraging grounds. (Read about baby turtles here)
  • Leatherbacks possess an incredible navigational ability. They can accurately return to their natal beaches to lay their own eggs, even after traveling thousands of miles across the ocean.
  • Turtles typically have sharp, pointed beaks. Leatherbacks, on the other hand, have tooth-like cusps lining the edges of their jaws. These cusps help them capture and consume their slippery prey.
  • Unlike other turtle species, leatherbacks don’t have a hard, bony shell. Instead, their shell is made up of a layer of thin, rubbery skin with a mosaic of small bones beneath it.
  • Leatherbacks have evolved a higher blood volume and a unique ability to store oxygen in their tissues. This adaptation allows them to perform deep, prolonged dives in search of their jellyfish prey.
  • They belong to the family Dermochelyidae, which is the only surviving family of a group of turtles that dates back over 100 million years. This makes them one of the most ancient lineages of turtles still in existence.

Conservation Efforts 

the heaviest reptile in the world

Conservation efforts to preserve all sorts of species are becoming increasingly important as we lose biodiversity at an alarmingly high rate. We must ensure future generations can experience and appreciate the beauty of all living organisms. 

Many species have become endangered or extinct due to habitat loss, pollution, and climate change, and the same goes for the heaviest reptile in the world, the Leatherback. Conservation efforts are crucial to ensure that these species are protected and that their habitats remain preserved, generally these include ongoing research, habitat restoration, and public awareness campaigns.

Conservation efforts specifically aimed at the Leatherback Sea Turtle Include:

  • Protecting Nesting Beaches: Programs implementing measures such as nest monitoring, predator control, and habitat restoration to ensure successful nesting and hatching.
  • Reducing Fishing Gear Impacts: Initiatives promote the use of turtle-friendly fishing gear to minimize accidental turtle captures in fishing nets.
  • Addressing Pollution: Efforts focus on reducing plastic waste, promoting responsible waste disposal, and preventing oil spills.
  • Encouraging Sustainable Practices: Sustainable fishing practices that minimize bycatch and protect marine ecosystems are being promoted.

We can safeguard these magnificent creatures and protect our planet’s delicate ecosystem by working together. Let’s all do our part to ensure that future generations can enjoy the benefits of biodiversity.

Wrapping Up

The Leatherback Sea Turtle is truly a unique and majestic creature of our planet. Its remarkable adaptations have enabled it to survive for millions of years. Nonetheless, it has gone largely unrecognized compared to other large land-dwelling species of reptiles. 

Its status as the World’s Heaviest Reptile is not just a significant accomplishment – it’s well-deserved recognition for how unique this sea creature is. Protecting and preserving leatherbacks and their habitats should be an utmost priority if we want them to continue thriving.

We can help ensure they are protected from further endangerment through awareness, education, and sustainable practices. So let’s take a moment to appreciate these magnificent creatures’ resilience and strength.

Thank you for reading this article! If you enjoyed getting to know the Leatherback, you should also check out our post about the Burmese Python which is causing havoc in Florida or get to know another record-breaking reptile: the largest Crocodile ever.

Check out Top 10 Places to Swim With Sea Turtles next!