Facts about Green Turtle Arribada
- 08
Hatchling green turtles at Tortuguero, Costa Rica navigate toward the ocean using light cues from the moon and stars, but artificial beachfront lights disorient up to 40 percent of emerging hatchlings annually.
- 07
Nesting beaches at Tortuguero, Costa Rica experience peak green turtle arribada activity during July through October, when moon phases and ocean currents align to trigger mass emergence events.
- 06
Sea turtles at Ras Al-Jinz, Oman can lay between 80 and 120 eggs per clutch during green turtle arribadas, with females producing multiple clutches across a single nesting season.
- 05
Female green turtles at Tortuguero, Costa Rica return to nest at the same beach where they hatched decades earlier, with some individuals traveling over 1,400 kilometers across the Atlantic Ocean to do so.
- 04
Temperature-dependent sex determination in green turtle eggs means hatchlings from warmer nests at arribada sites are predominantly female, creating skewed population sex ratios.
- 03
Synchronized nesting during green turtle arribadas at Ras Al-Jinz, Oman involves thousands of females emerging within narrow nighttime windows, creating a biological phenomenon that researchers attribute to pheromone signaling between individuals.
- 02
Green turtle hatchlings at Tortuguero, Costa Rica emerge primarily at night to reduce predation, with emergence peaks occurring within two hours after sunset.
- 01
Arribada events at Ostional, Costa Rica see up to 100,000 olive ridley sea turtles nesting simultaneously over several nights in July through December.