David Doubilet: Well, you fall off the boat backwards. My partner — my wife, Jennifer Hayes — and I hold our masks, we roll backwards, and this is the way you get in the water. And when the bubbles clear and you see a shaft of light, and you can see reflections on the surface in clear water, you roll on your stomach. Even in cold water, you do the same thing in a dry suit. And you head down into the darker and more mystical part of the dive, into the rest of the dive, and you’ll see everything from large marine creatures — which they like to call megafauna; I don’t like that word — but it’s again, sharks or dolphins or even whales, manta rays, you may see those. Depending on where you dive, you might see the top of a reef, you might see a great school of fish. And in the last 20 years for us, and earlier for me — 49 years I’ve been working for National Geographic — you see this absolute parade of life. And it never, ever ceases to amaze us.