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VI. Behavior.
A. Social behavior.
1. Sea turtles are not generally considered social animals; however, some species do congregate offshore.
2. Sea turtles do gather together to mate. Members of some species travel together to nesting grounds.
3. After hatchlings reach the water they generally remain solitary until they mate.
B. Individual behavior.
Little is known about the individual behavior of sea turtle species.
1. Green sea turtles are considered solitary, but occasionally from feeding aggregations in shallow waters abundant in seagrass or algae.
2. In the ocean, flatback turtles may spend hours at the surface floating, apparently
asleep or basking in the sun. Frequently, seabirds perch on the backs of the flatbacks.
3. Hawksbill turtles spend some time resting or sleeping wedged into coral or rock ledges.
4. Olive ridleys have been observed basking on beaches, and it is not unusual to see thousands of olive ridleys floating in front of their nesting beaches.
5. Leatherback turtles tend to dive in a cycle that follows the daily rising and sinking of the dense layer of plankton and jellyfish. The turtles probably feed in the upper layers of water at night. As dawn approaches, their dives become deeper as the plankton and jellyfish retreat to deeper water, away form the light of day. The turtles bask at the surface at midday when the layer sinks beyond their typical diving range. As dusk approaches, the turtles' dives become more shallow as the layer rises.
