How do the turtles find Ascension Island? There are sharks in the water too. Some of the turtles get eaten by sharks. Do the turtles know about sharks? How do they not think about the sharks when they’re swimming that 1,400 miles? Green turtles must have the kind of mind that doesn’t think about sharks unless a shark is there. Sea turtles can’t shut themselves up in their shells as land turtles do. Their shells are like tight bone vests and their flippers are always sticking out. Nothing they can do if a shark comes along. Pray. Ridiculous to think of a turtle praying with all those teeth coming up from below.
I think of them swimming through all that golden-green water over the dark, over the chill of the deeps and the jaws of the dark. And I think of the sun over the water, the sun through the water, the eye holding the sun, being held by it with no thought and only the rhythm of the going, the steady wing-strokes of the flippers in the water. Then it doesn’t seem so hard to believe. It seems the only way to do it, the only way in fact to be: swimming, swimming, the eye held by the sun, no sharks in the mind, nothing in the mind.
—Russell Hoban, Turtle Diary (1975)