Embryo and yolk sac inside an egg case of a swell shark, Izu Peninsula, Futo, Japan, 1982

“A strobe is nothing more than a bottle of sunlight, and when you turn that strobe on, just for a brief, pulsating second, for 1/2500 of a second, the image in front of you virtually boils with color. That’s what light is in the sea—it’s a tremendous and total surprise. It’s a bloom of light in a dark world. All of a sudden an image becomes something almost unworldly.”