The Leatherback Turtle

Meet the Leatherback Sea Turtle: The Giant Ancient Voyager of the Deep

The Leatherback Sea Turtle is a true titan of the natural world and the largest reptile currently swimming in our oceans. Known locally as the Baula, this prehistoric giant is easy to distinguish from every other sea turtle because it doesn't have a hard, bony shell. Instead, its back is covered by a thick, rubbery skin that feels like tough leather. They've got a sleek, teardrop-shaped body with seven long ridges running down their back, which helps them glide through the water with incredible speed. These turtles are the ultimate deep-divers and long-distance travelers, moving thousands of miles across entire oceans just to reach their favorite feeding grounds. Seeing a Leatherback emerge from the surf is like stepping back in time to the age of the dinosaurs, representing the most ancient and resilient side of Costa Rica's marine life.

Where to See Leatherback Turtles in Costa Rica

Because they're so large, Leatherbacks need very specific beaches with deep-water access so they don't have to drag their massive bodies too far across the sand.

Top 3 Best Places to See Leatherback Turtles in Costa Rica

• Las Baulas National Marine Park (Pacific): This is one of the most important nesting sites in the world for Leatherbacks. Between October and March, these giants arrive at Playa Grande to lay their eggs under the protection of park rangers.

• Tortuguero National Park (Caribbean): While it's famous for Green Turtles, the southern end of the park is also a vital spot for Leatherbacks. The best time to see them on the Caribbean side is between March and July.

• Gandoca-Manzanillo Wildlife Refuge (Caribbean): Located near the Panama border, this quiet refuge is a favorite nesting ground. It’s a great place to join a guided night tour during the peak months of April and May.

Frequently Asked Questions about Leatherback Turtles in Costa Rica

How big do they actually get?

They're massive! An average adult measures between 4.5 and 6 feet long and weighs around 1,000 pounds. Some rare individuals have even been found weighing over 2,000 pounds. They're so big that they're about the same weight as a small car.

Why is their shell soft?

Their "leathery" shell is a special adaptation for deep diving. Unlike hard-shelled turtles, the Leatherback's flexible back can compress under the intense pressure of the deep ocean. This allows them to dive to depths of over 4,000 feet, which is deeper than many whales can go!

What is the best time of year to see them?

It depends on which coast you visit. On the Pacific side, the peak season is from November to January. On the Caribbean side, you're most likely to see them between March and June.

What is the best time of year to see them?

They're very gentle giants. They don't have teeth, but they've got sharp, bird-like beaks and rows of spikes in their throats to help them swallow slippery food. They're very shy on land and will only focus on laying their eggs. You should never disturb them, as they're easily stressed by lights and movement.

What do Leatherbacks eat?

They've got a very specialized diet: they almost exclusively eat jellyfish. They're capable of eating their own body weight in jellyfish every single day. This helps keep the jellyfish population in check, which is great for the rest of the ocean's ecosystem.

Social Status: The Solitary Deep-Divers

The social life of a Leatherback is very private. They're solitary animals that spend the vast majority of their lives alone in the open ocean. They don't travel in groups or stay with their families. The only time they really interact with other turtles is during the brief mating period or when several females happen to choose the same beach for nesting. They're the "lone explorers" of the deep sea, perfectly comfortable spending years in the vast wilderness of the Atlantic or Pacific.

Finding a Mate: A Brief Meeting in the Deep

Finding a partner happens in the open ocean or just offshore from the nesting beaches. The courtship is brief and quiet. Once the mating is finished, the males return to the deep water to find more jellyfish. The females stay near the coast, preparing for the physically exhausting task of hauling their massive bodies onto the sand to start the nesting process.

Birth: The Cue Ball-Sized Eggs

Life starts in a deep nest dug by the mother high up on the beach. A Leatherback will lay about 80 to 100 eggs that're the size of billiard balls. Interestingly, she also lays several smaller, "yolkless" eggs on top of the pile. Scientists think these might help protect the fertile eggs by keeping the sand from packing too tightly. After about 60 to 70 days, the tiny, 2-inch-long hatchlings emerge and make their brave dash for the ocean.

Parenting: Born with an Internal Compass

There's no parenting in the world of the Leatherback. The mother returns to the sea immediately after burying her eggs. The babies are born with all the instincts they need to survive. They use the light of the horizon and the Earth's magnetic field to navigate. For the first few years of their lives, they stay in tropical waters where it's warm, growing quickly until they're big enough to handle the colder, deeper parts of the ocean.

Habitat: The Global Traveler

In Costa Rica, we only see a small part of the Leatherback's life. They're found in every ocean except the Arctic and Antarctic. Because they can regulate their own body temperature, they're the only sea turtles that can survive in freezing cold waters near the poles. They spend most of their time in the "pelagic" zone, which is the open ocean far away from land, only visiting the coast to nest.

Daily Life: The Ultimate Commuter

The day for a Leatherback is focused on one thing: finding jellyfish. They follow the "great migration" of plankton and jellyfish that moves up and down in the water column every day. At night, they feed near the surface. As the sun comes up and the jellyfish move deeper to avoid the light, the Leatherbacks dive down after them. They're incredibly efficient swimmers and can travel over 10,000 miles in a single year.

Behavior: The Deep-Diving Marvel

The most incredible thing about the Leatherback's their ability to dive. They can stay underwater for over an hour and reach depths of 4,000 feet. Their bodies are specially designed for this; their flexible shell doesn't crack under pressure, and their blood can store extra oxygen. They're truly the submarines of the animal kingdom.

Ecological Role: The Jellyfish Controller

Leatherbacks are essential for the health of the world's oceans. By eating thousands of pounds of jellyfish every day, they prevent jellyfish from overpopulating and eating all the small fish larvae. Without Leatherbacks, our oceans would be overrun with jellyfish, which would then cause the entire food chain to collapse. They're the guardians of the sea's balance.

Predators: The Hazards of Being a Giant

Adult Leatherbacks are so big that they've got very few natural enemies, though large sharks will sometimes try to attack them. The real danger's for the eggs and babies. Raccoons, coatis, and birds will raid nests if they aren't protected. Today, the biggest threat's plastic pollution. Leatherbacks often mistake floating plastic bags for jellyfish, which can be fatal if they swallow them.

Fun Facts about Leatherback Turtles

• They're the only sea turtles that don't have claws on their flippers.

• While they're reptiles, they can keep their body temperature much warmer than the surrounding water, which is how they survive in the cold North Atlantic.

• They're the only surviving members of a family of turtles that's been around for over 100 million years.

Cultural Importance in Costa Rica

The Baula's a symbol of pride and conservation in Costa Rica. Playa Grande and Tortuguero were some of the first places in the world to create strict laws to protect these giants. For many, the Leatherback represents the strength and mystery of the ocean. They're a reminder that we're sharing our beaches with creatures that've been here since the time of the Triceratops.

Tips for Travelers and Photographers

• If you're on a turtle tour, you must follow the guide's rules about lights. Even a small flashlight can scare a Leatherback away before she lays her eggs.

• These turtles are very sensitive to sound when they're on land. Keep your voice to a whisper to ensure they feel safe enough to finish their nest.

• If you're lucky enough to see babies hatching, a macro lens'll help you capture the amazing texture of their tiny, leathery shells as they head for the water.