When I took the lower photo, of a hawksbill turtle and a yellowhead wrasse, that seemed to be keeping a close eye on the turtle, I wondered if the wrasse knew that turtles don't eat fish. The bulk of a hawksbill turtle's diet consists of sponges, supplemented with other invertebrates. So the fish isn't in any risk of being eaten by the turtle. Depending on their age and size, hawksbill turtle dives can be as long as 30 to 60 minutes. After eating, they occasionally need to swim up to the surface for air (as seen in the top photo).
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