Although the existence of many turtles is threatened, the green turtles around Julian Rocks seem to have found  a refuge where they can swim, eat and sleep. The turtle photographed below was not worried by the camera at all and even inspected the red filter. 

Adult green turtles are the only turtles that are strictly vegetarian.
 

Green Turtle inspecting camera lens
Yellow green turtle
This green turtle looks very old. Almost as if it has been washed too many times. The barnacles attached to its body must have had an interesting ride....