For marine biologists and photographers, a nighttime dive into the ocean offers an austere backdrop for capturing the myriad creatures that live below the surface: entirely devoid of light, black water creates a stark visual contrast to the iridescent, translucent, and tentacled organisms that float in the dark expanses, making rare sightings of cusk eels and or billowing blanket octopuses all the more striking. An expedition by Alexander Semenov (previously) near Ponza Island unveiled an array of marine life off the western coast of Italy, framing their unique forms and movements. More