Photo: Brocken Inaglory (CC BY-SA 3.0) via Wikimedia Commons

Green sea turtle

The green sea turtle is the only marine turtle that nests in Galápagos, and it is the animal most likely to accompany your snorkel: grazing in the shallows, surfacing next to your panga, gliding past at Kicker Rock. Globally it was reclassified from Endangered to Least Concern by the IUCN in 2025, after four decades listed as Endangered; the Galápagos nesting population remains small and fully protected. Here is where and when to see them, and what the nesting season looks like.

Where to see them

Two beaches dominate the nesting: Las Bachas on Santa Cruz and Punta Cormorant on Floreana. Turtles feed in the calm mangrove coves of Black Turtle Cove and Tortuga Bay, graze off Isabela, and nap on reefs almost everywhere. In season you will find them mating in open water and, at night, females hauling out to lay.

The nesting calendar

Courtship and mating peak from November to January, and nesting runs from January through March, with the first females ashore in January. A female lays roughly 100 eggs per nest (clutches of 110 or more are exceptional for the species), in a hole she digs at night, and leaves flipper tracks in the sand as the obvious clue for morning walkers. On Floreana the nesting season stretches from December to May.

Hatching follows about two months later, from April into June, and the hatchlings race to the surf at night. The often-cited estimate is that roughly one hatchling in 1,000 reaches adulthood; introduced predators take a heavy toll on nests, and hatchlings are confused by lights from boats and buildings.

Built for the long game

An adult can measure up to 1.5 m and weigh over 200 lb, with the biggest specimens past 280 lb. Sexual maturity arrives absurdly late, at 26 to 40 years, and females return to the beach where they hatched to nest themselves. They are strong swimmers for their bulk, moving in bursts up to 30 mph when they need to.

The name is odd until you learn the reason: the algae in their diet tint their body fat green. And that salty lifestyle requires plumbing - a gland behind each eye excretes excess salt, which looks exactly like the turtle is crying.

Snorkeling with them

Turtles are calm and completely uninterested in you, which is the point: keep two meters, never block a surfacing turtle’s path to air, and never touch. The best snorkels for turtles are Black Turtle Cove, Tortuga Bay’s inner lagoon, Kicker Rock and Los Túneles. A turtle surfacing to breathe is the most common “wow” moment on a first-timer’s trip, and it never gets old.

Why they matter beyond the beach

Turtles are grazers that keep seagrass and algae healthy, and their nesting beaches feed everything from crabs to hawks. Because they nest only here in the archipelago, the local population is a single, fragile system: protect the beaches, and the whole cycle works. The National Park controls access to the main nesting beaches, and guides time landings around it.

For their nesting neighbors, see our sea lion page; for the sharks that share their waters, the sharks guide; for the season-by-season rundown, the wildlife calendar.

Last verified: September 2026