The majority of green turtle nesting in the Southwest Atlantic occurs on 3 Brazilian oceanic islands: Trindade Island/ES, the Rocas Atoll/RN and the Fernando de Noronha Archipelago/PE.

The green turtle exhibits an herbivorous diet during most part of its life. As hatchlings, however, this species has an omnivorous diet with a strong carnivorous tendency. Through their selective feeding on seagrass meadows, green turtles increase the productivity and nutrient content of seagrass blades. They also contribute significantly to nutrient cycling, and sediment stabilization, maintaining ecological balance.